Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12ac928c46ead6a…

MALICIOUS

PDF

46.1 KB Created: 2020-07-26 16:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44d88877a8e650c658d8f3245949570c SHA-1: 2ce21a8ba71b6799666a658a16e681381b4c774a SHA-256: f12ac928c46ead6af1be5a582fda6354c58920b67da6c9752eb927eacf499e32
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a PDF link farm. The primary link directs to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'measurement conversion metric to metric worksheet answers', suggesting a lure to trick users into clicking the malicious link.

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=measurement+conversion+metric+to+metric+worksheet+answers In PDF document text
    • http://files.architetturamcmm.com/uploads/1/3/0/8/130874102/raxadenazegu-fenedup.pdfIn PDF document text
    • http://files.racerengineering.com/uploads/1/3/0/7/130775665/a9009f5f2eabad.pdfIn PDF document text
    • http://files.creeksideband.com/uploads/1/3/1/3/131384789/3301404.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/1/0435/5679/8627/files/tosew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/48925789132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72966212333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/nebivivifevifapamili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/54730832537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/87116607952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4708/4447/files/65062941428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/wedawadodadonawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4066/0891/files/78367539977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/16855834972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/14901544918.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 8

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_off00007748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7748 5112 bytes
SHA-256: 70e89803c273b2d8bc653509a6ea761a83f5ce6fedd56efc4e1e4089feb7f0c5
font_01_sfnt_off0000888c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888C 10052 bytes
SHA-256: 26ba885652366f51f1522e771b9ff55888dfb690f2a9a80e6904d80a73ef2d31

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