Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7c21d9511ba510…

MALICIOUS

PDF

44.5 KB Created: 2020-08-12 06:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 95b0c723f9c5d5f4824194ee676a809e SHA-1: 27e5deb5f1d0ff1265e0a3c12dc04a054275fec9 SHA-256: 3e7c21d9511ba51070237b18cd64702779de04df7eca3a952b9fa457cc197edc
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with many pointing to external PDF files hosted on various domains, including Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=antminer+s9+specs+pdf'. This suggests the document is likely part of a link farm or SEO manipulation scheme, potentially designed to distribute malware or phish users through the redirector. No scripts were extracted, and the document body is largely unreadable binary data, but the extensive linking strategy is the primary indicator of malicious intent.

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=antminer+s9+specs+pdf In PDF document text
    • http://files.brokenknucklekustoms.com/uploads/1/3/1/3/131380316/808589.pdfIn PDF document text
    • http://sejepop.seafoodshifu.com/uploads/1/3/1/4/131454696/jozarabinogiz.pdfIn PDF document text
    • http://dotejup.creativejuicesboosted.com/uploads/1/3/1/4/131453934/1866176.pdfIn PDF document text
    • http://files.emf-help.com/uploads/1/3/2/3/132303083/505728.pdfIn PDF document text
    • http://bovus.awardwinningtruckwash.com/uploads/1/3/2/3/132303382/bedavubon.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/1/0428/2440/1063/files/8769022062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/povasogozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31056735454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/13125576790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4939/2030/files/nopekelujunujuzabev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3714/7804/files/btc_first_semester_math_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/jinuvamimoxageseromel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/belanamedonelijukojirexar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/37354264649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/36082177265.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
🗂 Part of campaign: brokenknucklekustoms.com 3 samples

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_off000065c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C4 5204 bytes
SHA-256: 1c91390c2c635137b723a38179a04e554c0902ec1a3be82419a67d7ef16944aa
font_01_sfnt_off00007750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7750 14440 bytes
SHA-256: 6c6321fb87d9c1f8de22c7ad5cb2074662baf14e357f05e72fdb704c83033b16

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