Malicious PDF — malware analysis report

Static analysis result for SHA-256 d638e35c3f6c3078…

MALICIOUS

PDF

39.1 KB Created: 2020-08-08 14:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1307e02aef65c248ade7f0737e1c8e47 SHA-1: 3b73c4dd41d3287b7a0ad1786e16473355e8f705 SHA-256: d638e35c3f6c3078f94622df79c8f63b8852e9032524edd4db16d3bc1049ee9a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised with keywords related to 'coaching questions'. The document also functions as a link farm, directing users to numerous other PDFs hosted on Shopify and other domains. The ML classifier strongly indicated maliciousness, and the PDF structure itself is suspicious due to a high volume of external links.

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/wb?keyword=coaching%20questions%20tony%20stoltzfus%20pdf In PDF document text
    • http://files.traleeresponders.com/uploads/1/3/0/8/130874305/0ded765fa8d6d.pdfIn PDF document text
    • http://files.fieldsofbeing.com/uploads/1/3/2/8/132816091/novosodigabigag.pdfIn PDF document text
    • http://files.cantoncatholic.org/uploads/1/3/1/4/131453805/nusitikegi-xesexewore.pdfIn PDF document text
    • http://files.goodgerpinkproductions.com/uploads/1/3/0/7/130740493/kikarod.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/1/0428/0510/0707/files/rinurokopuvigopajibikuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/77813929166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/pegukamifodan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/99489232901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/nixunudizepoxizojukeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/keurig_2._0_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/wafoxivisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0288/7322/files/break_even_analysis_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8190/files/detitajuperirojapanewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/98011766667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/mubuxebixinorumafuges.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 3

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_off00005be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE6 5504 bytes
SHA-256: 60c9edd53c4e2664d389a6fda661c7594605cdfb82e567880d5d10af9b984ea9
font_01_sfnt_off00006ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 9656 bytes
SHA-256: 76953742b4f0411a1e22a0bae0cd346c3437800387c9b1a45321351437efb9f2

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