Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb3796d48fe9d34…

MALICIOUS

PDF

40.5 KB Created: 2020-07-30 19:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8884b2213b10aff59ae37c8331f508af SHA-1: 4dcc35ecd0030d53dd7df6a8164a13cbe777f961 SHA-256: 4bb3796d48fe9d342a6f32c3448446ea5e8279ce270e26cb783a15ba54253c65
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) and are presented as educational material. This suggests a phishing or scam attempt designed to lure users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate this malicious intent.

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=simple+present+tense+and+simple+past+tense+worksheet+pdf In PDF document text
    • http://files.harmitasingh.com/uploads/1/3/1/3/131381078/b51ecd43.pdfIn PDF document text
    • http://files.risikat.com/uploads/1/3/2/6/132696112/053a0f59a.pdfIn PDF document text
    • http://files.jaxjacobsen.com/uploads/1/3/1/3/131398338/9240238.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/1/0433/0687/7080/files/xikosimuzewenox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/38721626793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6615/files/guresixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/47662328594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/25554344919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/xalumakawenupivabiwibab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/8879715144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/tegifake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/54835164726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/tisuxubomelene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/97847229230.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 4

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_off00005ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA4 5328 bytes
SHA-256: 5a07ee01c6cad0d62dbfb8e40a66d13123d536226baee1a8d07bdca1415352a0
font_01_sfnt_off00007096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7096 10524 bytes
SHA-256: 483340be0603dd1fd1b92124da8a63f6c30500236304efa62c095be9c3a65ae5

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