Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0874432529bc273…

MALICIOUS

PDF

156.1 KB Created: 2020-08-11 23:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 156ea6733b750c576e227ce71e2ff695 SHA-1: 5b9a204938dadf02d1d2447324df0074380dfdb2 SHA-256: a0874432529bc273789b59714291fe2eb3f2efbd91a4e7bdf26d563837923608
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, appears to contain the same URL. This indicates the primary attack vector is a lure to a malicious site. The presence of urgency and callback lures suggests a phishing or scam attempt, but the direct malicious link is the highest priority IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=arabic+to+urdu+dictionary+book+pdf In PDF document text
    • http://files.planningforgrowthnorthsk.com/uploads/1/3/0/7/130739835/nudamaromexanolilet.pdfIn PDF document text
    • http://files.maverickhilldressage.com/uploads/1/3/1/4/131407424/43ccfd93f.pdfIn PDF document text
    • http://gotuguw.grow-grace.com/uploads/1/3/1/1/131163635/puxuxigat_nulosibis.pdfIn PDF document text
    • http://bibeke.basecampiceland.is/uploads/1/3/0/8/130813528/newonavopifisa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/jadunukuxupikojepure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/atrial_fibrillation_the_latest_management_strategies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/milagro_beanfield_war.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/belepegivakilapakabilesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9495/0559/files/42940632407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/83480999962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8388/1893/files/xozupole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/19210278674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/64450421253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/budupakagezorupixerek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/dabimijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0957/files/gexabixalewumebep.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off000239e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x239E1 22540 bytes
SHA-256: f708d98826565f539c39165fd9b0f22244a84837f0849f5ca0564fefd5207f7d
font_00_sfnt_off00019653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19653 6440 bytes
SHA-256: 705377623a4c4344e02470fedf876d1ed6f0c7c0eac322cafb15afc9430d14bf
font_01_sfnt_off0001a617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A617 26628 bytes
SHA-256: fc8e1ea7275d8ad870f65d905c1f0f2039dc6484dd542ee85f7eafab20cdec2e
font_02_sfnt_off0001f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7AC 5232 bytes
SHA-256: 41bc33f2810e146b862d47a3ffca9af23b41a8de804148c58051530545780060
font_03_sfnt_off0002098d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2098D 15476 bytes
SHA-256: de38df1cf0bb5c16cafc42701fac4e4b5c6860427454ec4a383ba9535fbd550a

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