Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c8eb90ef4be654…

MALICIOUS

PDF

44.7 KB Created: 2020-08-01 02:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9189a251579269e7eec2d073bc4546d SHA-1: a19171adbdfd115e13c63a682f6c7d517bd72e03 SHA-256: 31c8eb90ef4be654294d0b003593338704dd0335de8e95b803c12ab5f2a03dca
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 a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. Another critical heuristic identified a large external PDF link farm, with many links hosted on 'cdn.shopify.com'. The ML classifier also strongly indicated maliciousness. The presence of these numerous links suggests a phishing or social engineering attack designed to redirect users to potentially 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.com/pify?keyword=roll20+curse+of+strahd In PDF document text
    • http://files.queenskitchencatering.com/uploads/1/3/1/6/131606059/nazerarefofoja.pdfIn PDF document text
    • http://files.martabrysha.com/uploads/1/3/0/8/130813769/pivoxifuvefarup_sovutelipunul_poweginevitiv_kuwite.pdfIn PDF document text
    • http://files.bsutransit.com/uploads/1/3/1/3/131381804/0ea26.pdfIn PDF document text
    • http://files.queenofthewaves.net/uploads/1/3/1/4/131437139/baselomixojapefuwumu.pdfIn PDF document text
    • http://files.britthipple.com/uploads/1/3/1/4/131453193/pemerenuru.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/1/0432/5031/9517/files/66276009487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/51345131473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/27036903254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/gufeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48675385277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/92930880512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/ruwomipusefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/60568498280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/taxegopetax.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_off00006fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA8 5392 bytes
SHA-256: 0a6b55cd84bd18a4cdf6452cafeaf28d9d52404c062c5a5771225bf431d8c316
font_01_sfnt_off000081f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F7 10648 bytes
SHA-256: 9dfc563c46e05af71e22ba4646835ec4872803a5342ee3768caa9d7b55b80e4d

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