Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8925e7b70bd1911…

MALICIOUS

PDF

40.5 KB Created: 2020-08-12 06:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cffde8c4bc5b6ba6be69f5fb88e56ddf SHA-1: d023c6c8bce54a2392b5a459f21815a27977e031 SHA-256: a8925e7b70bd1911bd4edafea45bc579769ed1918833e743e1ba6b3581d8065c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains a reference to the same malicious URL, suggesting an intent to redirect the user to a potentially harmful site for phishing or malware distribution. The presence of many SEO-optimized PDF links further indicates a campaign to attract unsuspecting users.

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=demand+definition+economics+pdf In PDF document text
    • http://files.rudegallow.com/uploads/1/3/1/0/131071167/3553581.pdfIn PDF document text
    • http://files.purelysimplelife.com/uploads/1/3/1/4/131407549/9255285.pdfIn PDF document text
    • http://nafoves.smartnetworksco.com/uploads/1/3/0/7/130775413/931a74ede38db.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/1/0432/1384/8733/files/ribimozukuguxuboka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/fujutuwinuzuzulivobibob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/32963350051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/cervical_cancer_screening_guidelines_acog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/84528436032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8276/6743/files/73333796529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/jiratomarusajitaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/35933954508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/raxarapodanunokolugojin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/92597642527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/95043010794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/68931212020.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 3

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_off00006273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6273 5172 bytes
SHA-256: e9910e40295eb464f1819f1615163818527e39291e0b5d77d262b5bf62bc2a9d
font_01_sfnt_off000073fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FC 9652 bytes
SHA-256: 629ddad23b787ec1af9320a1e71ec2d38d888bec0f47c62ee43277411e29d150

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