Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dec7728e76d5879…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 15:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 79046add0b3bd82af3086aef33eb201f SHA-1: 9bdb1ab1873dda865fe37de06c7d26646962c7b9 SHA-256: 7dec7728e76d5879345f6eead4bedf4f20a6ee73e845179f1b34ee029c4e0070
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. This indicates a phishing or scam attempt, likely using SEO tactics to appear as a legitimate document. The document body itself is heavily obfuscated but contains the same redirector URL, reinforcing the malicious intent. No scripts were extracted, but the presence of malicious links is sufficient evidence.

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=embryologie+du+tube+digestif+pdf In PDF document text
    • http://files.pieplacechatt.com/uploads/1/3/1/4/131483138/b2bd10ce9.pdfIn PDF document text
    • http://files.salemsong.org/uploads/1/3/1/6/131637701/lafotewamopafex-fefageje-potajebisikez.pdfIn PDF document text
    • http://files.courtneytravels.blog/uploads/1/3/1/4/131406885/20409821677efd8.pdfIn PDF document text
    • http://files.newlearnerlab.com/uploads/1/3/1/8/131856244/dezipejuribekinenu.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/1/0432/8397/2256/files/84219220783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/85016436958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5111/3883/files/eric_ambler_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/pivum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/nupizizudifunakiliji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/70173267905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/xumufapux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8713/2827/files/python_udp_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/62463533873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/mikijemadegusavazusuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0763/1782/files/ranetixejipiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3784/files/arkham_city_cheats.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 5

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_off000065b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 5352 bytes
SHA-256: bb80b744c6569e8f436759e7e1480fc6ddb701e0ae33ad738761978f61b8ef2e
font_01_sfnt_off000077de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DE 11308 bytes
SHA-256: cf4f5cb1db0310b78dbc42718cab225c79970710a06b3f13b31c43edc1f53833

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