Malicious PDF — malware analysis report

Static analysis result for SHA-256 de555a852a1a789e…

MALICIOUS

PDF

47.1 KB Created: 2020-07-30 19:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f0e553568c65f221034f8c8b593a88a SHA-1: 88ca6bf062b2e30dd100f14d591786935434e92b SHA-256: de555a852a1a789e8be5e866546d70a9ec87ebd61dd026c979e12d992b0e9080
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'pathology slides pdf'. The primary malicious IOC is the ttraff.com redirector, which is likely used to funnel victims to a further stage of the attack. No scripts were extracted from this sample.

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=pathology+slides+pdf In PDF document text
    • http://files.anthonyescobar.org/uploads/1/3/1/3/131379724/dumam-bezipotapo.pdfIn PDF document text
    • http://files.nzrallycars.co.nz/uploads/1/3/1/4/131452806/nodimenamobovifej.pdfIn PDF document text
    • http://files.sacred-expressions.com/uploads/1/3/0/7/130740012/6597957.pdfIn PDF document text
    • http://files.saraelizabethtaylor.com/uploads/1/3/0/7/130775734/6015008.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/1/0433/0687/7080/files/8917749958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/tofidotitekonizipudisomon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/89750731232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/tilikikenafatamorewigur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/babefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/vetepekasawoxul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/wokezuxiramilinivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1769/7437/files/97257018813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/tadabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1230/8637/files/bojijaleturanijoborizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/46974775262.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_off00007ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 4992 bytes
SHA-256: 3aaccfb7adef66a695c1b401a9bd7807bc6a0ab04717958b2580516fba0ea026
font_01_sfnt_off00008bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDA 10440 bytes
SHA-256: 0ba32e079be83259a4809671f56ae07aec0e9926b96c61e5b267d03aab8ae9cf

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