Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a910c8ba227b6e3…

MALICIOUS

PDF

40.9 KB Created: 2020-08-27 21:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a31423a9001edf5017110e7b95eadac1 SHA-1: db05bf0e530014513ea3635924506f7589c2e9b3 SHA-256: 6a910c8ba227b6e3a142e1d5dbd18971fd155c1bf148ed9865027c484b81e256
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a lure for users to download further content, likely malicious, from the 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.ru/pify?keyword=karma%25C5%259F%25C4%25B1k+say%25C4%25B1n%25C4%25B1n+e%25C5%259Fleni%25C4%259Fi In PDF document text
    • http://gopal.methowvalleyciderhouse.com/uploads/1/3/1/8/131856195/7143988.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/1/0434/5410/3713/files/jemesikuvururaxojapiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/murow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7985/0397/files/biology_class_12_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3846/5435/files/1050_vs_970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/vivixinojadudazavaratesil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/vampire_weekend_full_album.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7451/files/61659781802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/xeguvowizizade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3063/3881/files/rotate_90_degrees.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/9369304698.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5271 5476 bytes
SHA-256: 75557a5eae60f8dbc8a52c4d6d31c09e5c40d23113a913b0ca23327899937e90
font_01_sfnt_off00006484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6484 2252 bytes
SHA-256: aeee9b2fd577c594ede074a7e3493832e024aab8d381a7c1d16527c2e435dd06
font_02_sfnt_off00006ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 12376 bytes
SHA-256: 676383d460e2930316c32ad5d8fd1143aec9f8caf0b96f728f141266d72989de

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