Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc158e6c6649a14…

MALICIOUS

PDF

41.9 KB Created: 2020-08-04 17:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e017127c314ecafb94b15ff964f3a9d8 SHA-1: 37750e75a1725bfd0575f530376d818e9126a74a SHA-256: 3dc158e6c6649a1477028d4dacf28970cb975e7b19d526c6977a8ea4689ffa9c
194 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com', identified as a malicious redirector. This link is presented within text that mimics a free PDF download lure. The presence of numerous other links to PDF files, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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.com/pify?keyword=pdf+books+free+download+online In PDF document text
    • http://files.tormonbrothers.com/uploads/1/3/0/7/130775393/siwar.pdfIn PDF document text
    • http://powot.michelleleafloor.com/uploads/1/3/1/3/131380480/1628817.pdfIn PDF document text
    • http://files.mrsmellor.com/uploads/1/3/1/3/131384113/5981116.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/1/0428/3029/9292/files/zawekerezoxizuxofili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/57362451654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3217/5014/files/71638934424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/fulalovumasuzobegiluneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0097/7829/files/54924687703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/79740577359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4924/5079/files/priority_queue_java_comparator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5125/2896/files/physical_chemistry_a_molecular_approach_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/45148704860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/26229372321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/biwebo.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_off00006638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 5196 bytes
SHA-256: f359bd3e3a0f540cce32df4b1f8dd98b2cc2e10df44c2278afc124643b3f72ae
font_01_sfnt_off0000780a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780A 10032 bytes
SHA-256: b529718695a146c52389c21213507d0611d04164fad776d6e629fb79c869f863

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