Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c42e0d3bcc7a14a…

MALICIOUS

PDF

42.8 KB Created: 2020-08-14 08:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aef6af91c6039aad0d46c35669db8dc6 SHA-1: 57be017228e1ff709b6ceb20b9749a158becf072 SHA-256: 3c42e0d3bcc7a14a26cd1793a8fd81d15910f1a96a97e95ac13b23a04737da4b
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. The heuristic firings confirm the presence of malicious redirector links and a link farm structure within the PDF. The primary goal appears to be directing users to malicious sites through a deceptive link aggregation.

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.cc/pify?keyword=coronary+atherosclerosis+pdf In PDF document text
    • http://files.ladkilove.org/uploads/1/3/1/3/131379219/66046.pdfIn PDF document text
    • http://files.festivalentreislas.com/uploads/1/3/2/7/132710621/difuwexapedilelira.pdfIn PDF document text
    • http://files.intersektart.com/uploads/1/3/1/1/131164386/7701719.pdfIn PDF document text
    • http://files.luckypennyrealty.com/uploads/1/3/1/6/131607027/9178004.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/1/0431/2816/0417/files/fusionner_sans_logiciel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3622/1351/files/xizuvibaguguwajuzizaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/100_accounting_interview_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9583/2216/files/basic_english_learning_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/56422869821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/11797640137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/suxizatuborolebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/cell_culture_techniques_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2845/4304/files/exceptional_learners_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/kukav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7944/1307/files/17158658678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/wufewesopozas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/96189571594.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 6

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_off0000688b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688B 5248 bytes
SHA-256: 9fa2c42dd35e6a31c35048041ce3083904f01d35d58dd984114b9825505c4c23
font_01_sfnt_off00007a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A60 10656 bytes
SHA-256: a239f02f8a6e4acdededddb63fd62df6eec3a43d2c4b38339a09f73a297f522e

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