Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a534777cbef000e…

MALICIOUS

PDF

42.2 KB Created: 2020-08-11 14:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e1528b7ed3f1d7091a9f268c1e88c7bc SHA-1: da7f6b31a195861131707a72676c6c2c75724ec9 SHA-256: 5a534777cbef000ec87d4f14c91e3d02dbaa68a5d49ab390d0d81bb8e4806607
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as legitimate documents but redirect to malicious infrastructure, specifically a link farm utilizing a redirector. The primary lure appears to be "stainless steel square bar sizes pdf", which is used in the malicious redirector URL. While no scripts were extracted, the PDF structure and embedded links strongly indicate a phishing or redirection attempt, likely to deliver a second-stage payload or lead users to a credential harvesting page.

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.cc/pify?keyword=stainless+steel+square+bar+sizes+pdf In PDF document text
    • http://files.bengonzalez.com/uploads/1/3/1/6/131606636/6252550.pdfIn PDF document text
    • http://files.andrewatkins.org/uploads/1/3/1/8/131858916/4836997.pdfIn PDF document text
    • http://files.relianceservicesllc.com/uploads/1/3/2/6/132696104/5a0f0d3688bd0a.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/1/0431/0417/4233/files/she_s_got_the_look.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/nujuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sividejujim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/12228886766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/88410597588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1087/3765/files/77721282563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7839/3764/files/vsd_to_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/wudefixariwagadabazeked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/29850141089.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 4

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_off000065be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 5456 bytes
SHA-256: 257a3377ec66077e84e40b6220e9d7510835013b57bf7b5574b6dfcc0c28951a
font_01_sfnt_off00007849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7849 10452 bytes
SHA-256: 4fe77453a2eb75d301ea6fd8d937001a75d89af1d2fca14441a448715f6a796c

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