Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd33f41bd44f74c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-25 12:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78b2036d912a221316e952db4225e80b SHA-1: a0eda11510f3f136047e7ee25c92e4a355d18b3d SHA-256: cfd33f41bd44f74cb92878f8fa8d57a5cf8211b88a08051e4b5fbe9758553477
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used in conjunction with a lure for a 'french english dictionary for mac free'. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external PDF links further supports the SEO link farm heuristic.

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=french+english+dictionary+for+mac+free In PDF document text
    • http://files.debratidball.com/uploads/1/3/1/8/131871698/gezisenoxijuz.pdfIn PDF document text
    • http://namutu.meganbadger.com/uploads/1/3/1/8/131856476/4350653.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/1/0431/4162/8072/files/16152263901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2384/2983/files/66158678558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/marvel_future_fight_apk_data_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/0214/3391/files/cabernet_sauvignon_nutrition_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/gapugerenoweda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/fasexozim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5267/6773/files/maradawexevog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/anker_powercore_10000_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4049/5000/files/gubumetavozexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3698/0886/files/list_of_caribbean_countries_and_capitals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8449/4488/files/rojapimolidoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/83951340797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/78538656678.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 2

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_off000064ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EC 5492 bytes
SHA-256: 5040ad26cc5215927cf1a2437596620829b5536d44c58812267683f205665e59
font_01_sfnt_off00007771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7771 10692 bytes
SHA-256: f606b26aaaa71694260550c68c305fb65232ca81175d21e42202fc0badc6c6a1

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