Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc9aea28f9362e6…

MALICIOUS

PDF

41.7 KB Created: 2020-08-01 13:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 038df5825b2efb6c824ad779ab97e9d4 SHA-1: 520397b03cf8dbe09475c9d9fd2888fbf7a63d08 SHA-256: 6bc9aea28f9362e6925d9a6e47d76cb9ecb1ea9aa2084060e6e88cac97f8c58c
194 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to a redirector service, indicating a link farm or SEO poisoning attempt to lure victims. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded links suggests an attempt to redirect users to malicious infrastructure. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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=2018+%25D0%25B3%25D0%25BE%25D0%25B4+%25D0%25BA%25D0%25B0%25D0%25BA%25D0%25BE%25D0%25B3%25D0%25BE+%25D0%25B6%25D0%25B8%25D0%25B2%25D0%25BE%25D1%2582%25D0%25BD%25D0%25BE%25D0%25B3%25D0%25BE In PDF document text
    • http://files.board.solonchamber.com/uploads/1/3/0/7/130739152/1727025.pdfIn PDF document text
    • http://files.killianhsmusic.com/uploads/1/3/2/7/132740536/nijekekanepasa_xuxevosijukok_lovilexedip.pdfIn PDF document text
    • http://files.8citiesnb.com/uploads/1/3/0/7/130776230/1314321.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/1/0436/1525/6738/files/laduzivusupabopar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/riwimadumafaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5538/0645/files/16103688691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/79799031410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5529/2317/files/benikokeraj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/52305096160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/12080785612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6154/1014/files/rukobawebovakita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2617/6407/files/29895311483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7054/5308/files/58440561207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/dawepiribegodaxu.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_off00005b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B46 5584 bytes
SHA-256: 36b1f3d73fcd6e244ab28a21a4a6fbb79e4d3274bacf19dc42db8712a3f7c7e9
font_01_sfnt_off00006e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E36 13156 bytes
SHA-256: c9f8bc9cf834c0e65238f70347e402dcc34a4e576530a2c8a15ae521ed61bce0

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