Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a7532ce98519d3…

MALICIOUS

PDF

43.2 KB Created: 2020-09-11 19:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 228d9a69ae6fc267397860434ceb561a SHA-1: 6cf26dacbe939567d3d09bebf5b992b6db991f75 SHA-256: d8a7532ce98519d37a7f0c9ad2ed85f155a8f0acbef5811ea40a8b12b8706cb7
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is disguised as an answer key for a balancing equations worksheet. The document body also contains this URL and numerous other links to external PDFs, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.link/pify?keyword=balancing+equations+worksheet+part+1+answers In PDF document text
    • http://files.blessedredeemerpb.org/uploads/1/3/0/7/130775677/woxaw-zosiditos-milujexozilo-lebaforugo.pdfIn PDF document text
    • http://files.wildfireartisans.com/uploads/1/3/1/4/131453598/49fe56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/d954c5_6002e172cc3b4f1d926263dabece2274.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/52b593_7206d5ee34f844449e9aeec4307be0d3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7c30af_fa93cd3e8b7043588e228b9cba18ab36.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/facebook_video_er.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/89826561729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/ts_16949_standard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/transunion_free_annual_credit_report_request_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/79648873020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/9805/4312/files/21293985773.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D69 5460 bytes
SHA-256: bc08839a0de1134e3204096245b8d8cc4583bc2a3147164892b8e222c0b04466
font_01_sfnt_off00007004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7004 9940 bytes
SHA-256: c96e94fba18f9c434e13cdd2a2a92b4aa2c4f2f2b057b10752a18ae455c992ef
font_02_sfnt_off00009208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9208 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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