Malicious PDF — malware analysis report

Static analysis result for SHA-256 39bca38fc35ffde4…

MALICIOUS

PDF

35.6 KB Created: 2020-08-22 12:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7277d364595b8c518b1a85dba7e0b570 SHA-1: 2284c53024643ba5b028a918a0917c86c566afca SHA-256: 39bca38fc35ffde4aed7558f630d49cf61dbca050a0df642195a339af4300c59
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=fivb+score+sheet+3+sets'. Additionally, it exhibits a PDF link farm behavior, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to redirect users to malicious infrastructure. The primary intent appears to be directing users to the ttraff.ru domain for further malicious activity.

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=fivb+score+sheet+3+sets In PDF document text
    • http://files.newwestminsterchristadelphian.org/uploads/1/3/2/7/132740836/9b3acbd5743.pdfIn PDF document text
    • http://files.mccrayart.com/uploads/1/3/2/7/132740362/9602397.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/1/0436/5107/2158/files/www_carplounge_de_anleitungen_gps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/15697837129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/that_was_easy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/5445/9030/files/siwofetepixamal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/formosan_aboriginal_culture_village_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6089/5384/files/mokekeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/network_engineer_interview_questions_and_answers_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/character_education_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/additional_mathematics_pure_and_applied_talbert_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2147/4714/files/11873451018.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_off00004f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F93 4964 bytes
SHA-256: d0b87b1b1e0ec2bef9588034b276e9d110a1cbb5db812476cb6b92d4c4aab7de
font_01_sfnt_off00006071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6071 9900 bytes
SHA-256: 51cbec6277ffaab6a730aafed2a0da8246c66a0ac0909a8ab6a16d2c79b5bc63

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