Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f36981ac6efb41…

MALICIOUS

PDF

38.1 KB Created: 2020-08-16 22:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8c41aade6bcbd928d3db26c6834d859 SHA-1: e6251e02d71e4bf45056faf342262bc8cebecafb SHA-256: e4f36981ac6efb414a45a0f399138c7f0f62f8675ded15cf26009a6c6d6c01f0
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented in a way that mimics a legitimate service, likely to trick the user into clicking it. The document also contains a large number of embedded links, many hosted on Shopify, forming a link farm, with one specific PDF 'pisawotifuf.pdf' being part of this farm. The ML classifier strongly supports the malicious nature of this PDF.

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=cambridgeshire+county+council+highways+reporting In PDF document text
    • http://files.fightroom.org/uploads/1/3/0/7/130776739/ziloderojibotox.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/1/0438/2267/8173/files/pisawotifuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9794/7300/files/compreender_behaviorismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/19917799787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/11126726168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/dobulezinubixewomewine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/23598851863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/bixojozupuzirirolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5453/8656/files/dsp_first_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/3707341660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5517/7109/files/java_swing_full_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4803/2673/files/dragons_dogma_names.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: fightroom.org 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_off00005697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5697 5728 bytes
SHA-256: 40d9221ee0fb16b7ca89784035f6cc931ea2d19fce33a966077086aace28883c
font_01_sfnt_off00006a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A02 9760 bytes
SHA-256: 576bf496785c154012b0fdad99936e1640d5be75fa736f4e1f030443880b8bb0

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