Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f8af45ee2f32f3…

MALICIOUS

PDF

54.0 KB Created: 2020-08-12 19:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5180835b35cef70de98a62fc3fcb0be7 SHA-1: a00e4391bb1e08ea1b2be221c7375413dcfbb346 SHA-256: 31f8af45ee2f32f32c55339d65dec826f229adcf2a696d6448dd1d64712702c8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of numerous links indicates a link farm or SEO poisoning tactic to distribute malicious content. 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.ru/pify?keyword=tell+me+about+yourself+answer+for+experienced+software+engineer+pdf In PDF document text
    • http://files.nathanrgeorge.com/uploads/1/3/1/4/131409309/vovanurowiwe_sefevel_wubogaman_tokuzanox.pdfIn PDF document text
    • http://files.dreamscapesiberians.com/uploads/1/3/0/7/130740490/gavivibivulibu.pdfIn PDF document text
    • http://bulasawa.chrisandkell.net/uploads/1/3/2/6/132681352/cccb09836653b7.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/1/0433/1234/9334/files/anthelmintic_activity_of_medicinal_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/deruvexedesupamozudegil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rojifibopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/45429546746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/78215097670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/61355983811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5145/0519/files/muvon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7177/4615/files/73838516310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/79292350644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/tmux_list_sessions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/litavepadowir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/27474853582.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 6

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_off00009186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9186 5828 bytes
SHA-256: 322d2f731a3b6ba6bcd2f2c11556ab019a289988e4ff920a44e1845760f72fcc
font_01_sfnt_off0000a561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA561 10864 bytes
SHA-256: b8586a137d15e462b30d1a40eaee00948ed7d151b147ab609553498d463c95f8

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