Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9b3e53d8969f17…

MALICIOUS

PDF

34.4 KB Created: 2020-08-30 03:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92b53e7d4d5e5473bef3805a1a08124d SHA-1: 2d1b88f7bb4ba4d7dcc1781c2359cf3bf391ab03 SHA-256: 6a9b3e53d8969f174a541416b0944ed4fc86daa47c0127234da60fa19ef84972
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body and heuristics indicate a lure for free educational materials, likely a phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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/wix?keyword=cambridge+a2+key+for+schools+pdf In PDF document text
    • https://shop.swiss-exams.ch/produkt-kategIn 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/1/0431/5630/8123/files/70536343993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/zitinopilezisetakikediv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7186/4993/files/pofabelede.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/06497e_cc930133a9964088b83739b81bd1c79a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_598d844e8b7f447f83e8214680b1098b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/097bd5_a647a2ccccb3472383b81afbc0f02da6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a771bd_f211971dd03f4754a4750af0933a0c38.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2c250_6cc0d3d975094bbea3f02d3fa519c92f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0681/9477/files/spirit_stallion_of_the_cimarron_char.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/38548119165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/vapurojidunatalupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/4522263492.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_off000045fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45FC 5912 bytes
SHA-256: a9d965486730456e36a206c9471e64f0d882ad3dca92c8c72072de627dfcec52
font_01_sfnt_off00005a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0A 10256 bytes
SHA-256: cd1754418cc085463d5804c605e7ea4f6d39e5bd651e6d4385818f07995cc12b

Open this report in the interactive analyzer, or submit your own file for analysis.