Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d4ac217794a349…

MALICIOUS

PDF

67.5 KB Created: 2020-08-08 05:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: afa561801d21d73e8e44f308a6a6a690 SHA-1: cb4994714eb23ed30a22a95f2df38f5afc019d9d SHA-256: f3d4ac217794a34918d2013cb18eb1cc0a02e0a84e0096d05f21c4af235bda27
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to direct users to harmful content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL that is also flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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.cc/pify?keyword=calcium+homeostasis+pdf In PDF document text
    • http://files.confessionsofanunderachiever.com/uploads/1/3/0/7/130740257/98061e9be39e.pdfIn PDF document text
    • http://files.imperialdancecompany.com/uploads/1/3/1/4/131409244/xabixugip.pdfIn PDF document text
    • http://files.ggrubberstamps.com/uploads/1/3/2/7/132710627/09b9beea.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/1/0434/5639/7464/files/52667169453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/complete_spring_framework_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/xoxodakakilegusugituf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/36275897781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/rogalobuwegokevalijimadeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/zaladaberebozewutazimuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/zuros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/sileta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3363/9584/files/wodojuminamunune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5930/4865/files/odysseyware_geometry_semester_2_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2286/6842/files/cannabinoides_endogenos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/xevanataworor.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB313 5204 bytes
SHA-256: 0bf067dd0c18a2e5ea0700c57164daf1ec28a9a6fb724ed1361c73b3f2b9e991
font_01_sfnt_off0000c4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A0 11768 bytes
SHA-256: 62ef49fa322eacad79b4ef00871934c1fe04f5e5ae5c964ea9a58500450b04ea
font_02_sfnt_off0000eb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6E 16208 bytes
SHA-256: 100525de4ec19a892231ae9e500df077d17dce85b7aae2dba1a2f8913790d544

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