Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a4249831060fe5…

MALICIOUS

PDF

51.9 KB Created: 2020-09-12 08:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db90872a5e197fb4faf84f76c7063ec3 SHA-1: 4c562018f0b4ee505a8a9f128e93d5264dc6488b SHA-256: a7a4249831060fe5362415b55f3f76a3a66c2ecf57479d89d6b41e15f77d6238
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with keywords related to 'machine learning stock market'. The document also exhibits characteristics of an advance-fee scam, suggesting a lure to a phishing or fraudulent site. The presence of numerous outbound links to PDF files hosted on various domains further indicates a link farm or SEO manipulation tactic to drive traffic to malicious destinations.

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.club/wix?keyword=machine+learning+stock+market+pdf In PDF document text
    • http://files.boltworks.org/uploads/1/3/1/4/131453982/3658798.pdfIn PDF document text
    • http://dapefa.utahstudentnurse.org/uploads/1/3/1/4/131438304/vezoziwofu-nobizobenofusu.pdfIn PDF document text
    • http://files.midtowntorontotherapy.com/uploads/1/3/1/4/131482886/gobefote_bezamosofe.pdfIn PDF document text
    • http://files.annettecargill.com/uploads/1/3/0/7/130738553/zusor.pdfIn PDF document text
    • http://nosis.arfamilycoalition.org/uploads/1/3/0/8/130813780/mupimot.pdfIn PDF document text
    • http://files.rmssf.org/uploads/1/3/0/7/130775384/mexetuzumabekuki.pdfIn PDF document text
    • http://files.juliedowling.net/uploads/1/3/0/8/130873822/mukusamigufonewiga.pdfIn PDF document text
    • http://files.silentwitness.net/uploads/1/3/1/3/131383838/mevolurasuxulilaw.pdfIn PDF document text
    • http://files.cassieorduno.com/uploads/1/3/1/0/131069934/vudipenegidiloxuxaso.pdfIn PDF document text
    • http://natijuve.allterrainridersatvclub.com/uploads/1/3/2/6/132681229/7500da67015.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/naforolalizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30698029692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/jemorazunobas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6264/7192/files/importance_of_arabic_language_in_islam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/fusaraveluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/voxowawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6866/8569/files/jewipowid.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CE 3304 bytes
SHA-256: 7054202772682b24f11599058d951f637b8cd39cbb91149f9ca434d6f8725165
font_01_sfnt_off00007eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB3 5428 bytes
SHA-256: e3bd1649c3fee02a23b692c0bacc1da3c0e87e3482d26f810d2cbd6bc68fc7da
font_02_sfnt_off000090f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F4 10240 bytes
SHA-256: 70211bfc2f369828cb010e144cc5a017db938e5626927e701f5b56e8f3692112
font_03_sfnt_off0000b3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3