Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c236ec51ecc516e…

MALICIOUS

PDF

39.9 KB Created: 2020-08-24 23:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6f42d31f3c8a4c581b46065b8b8e6f77 SHA-1: cae623806dcb3e88994a371468f01ae0ab296150 SHA-256: 8c236ec51ecc516e9728b93d930e085ecf60b6876d057b3ddd502d9b8af900f0
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, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=what+is+baseline+survey+report', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to drive traffic to potentially malicious sites. The primary goal appears to be directing users to external resources that likely host further malicious content or phishing pages.

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=what+is+baseline+survey+report In PDF document text
    • http://dotadofo.johnachten.com/uploads/1/3/1/3/131383664/133ec.pdfIn PDF document text
    • http://files.juantp.com/uploads/1/3/1/1/131164556/zipononu_lodivitevap_tonimuw_pajixiditavo.pdfIn PDF document text
    • http://ditowino.danielltutoring.com/uploads/1/3/1/4/131453134/3555886.pdfIn PDF document text
    • http://vevel.qslowsmoked.com/uploads/1/3/1/4/131406535/5563854.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/1/0431/5539/0630/files/moxafilez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9879/1333/files/calcul_metabolisme_basal_formule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7330/0632/files/joint_probability_distribution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/wufikosibon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/counselling_skills_for_managers_kavita_singh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/rt-_n66u_tomato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9956/9832/files/dipipasuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/13540545454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/learn_portuguese_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/42441001163.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 7

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_off00006084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 5220 bytes
SHA-256: 8db08c1a1a0a73634a8db397d71c95eae7a9e2f3fcbe09eb340fddcf401a0575
font_01_sfnt_off00007245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7245 9616 bytes
SHA-256: 95a7e8bd304496265d5bfa9c3ea0e386a7798058bbdf0cda9604d604ea2a3c71

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