Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87d91e99b4751c9…

MALICIOUS

PDF

58.0 KB Created: 2020-09-20 19:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aa9e8efab40775e82feb5f7aa5480d0a SHA-1: 432b5c217e9f08eb65aa68b394a0fbfc3fdb1ae3 SHA-256: a87d91e99b4751c9e55122a37c415b68aa40e20ea2f17010a9775dab1ccc97ed
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'Bissell pet carpet cleaner user manual' and includes the primary malicious URL, indicating a lure to trick users into clicking. The presence of numerous external PDF links points to a link farm strategy, likely for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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.me/wix?keyword=bissell+pet+carpet+cleaner+user+manual In PDF document text
    • http://files.plainbird.org/uploads/1/3/1/0/131069934/vuvuf-giwamojisivibeg-moxoxa.pdfIn PDF document text
    • http://dogekiwo.myuplanddental.com/uploads/1/3/0/7/130776257/letivawejakaguj-dagojexun-zituz-janad.pdfIn PDF document text
    • http://files.rhythmstick.co.uk/uploads/1/3/1/8/131856276/kepeda_gorogasenirub_jefaveviva_somapijox.pdfIn PDF document text
    • http://files.2ndchancehypnotherapy.com/uploads/1/3/0/7/130739651/nokugowug-dukob.pdfIn PDF document text
    • http://fuzidu.dharmawomble.co.uk/uploads/1/3/2/6/132681352/5344928.pdfIn PDF document text
    • http://files.chililibrary.org/uploads/1/3/2/6/132682076/5cfc8669.pdfIn PDF document text
    • http://files.crossroads-university.com/uploads/1/3/1/4/131408664/tiraradaxejite.pdfIn PDF document text
    • http://porekimew.cbpso.com/uploads/1/3/1/3/131384305/jagaki.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/1/0428/9606/4671/files/65318275788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6387/7537/files/ada_guidelines_for_diabetic_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6750/6839/files/antas_ng_wika_pormal_at_impormal_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3182/5317/files/ecdysis_in_insects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4571/4077/files/79274848360.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E8 5128 bytes
SHA-256: 1d41ce0d88c6dbb7f612f5e5be6c9c5a50b0d8fe8644cf58fb633a2885ce66e5
font_01_sfnt_off0000b943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB943 9888 bytes
SHA-256: 4a5eb3283bb7a68c909eaff404acfe1cc8fa7adf45ad2ca3eec59b011c9c3cf4

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