Malicious PDF — malware analysis report

Static analysis result for SHA-256 31064e31daf91cd2…

MALICIOUS

PDF

44.5 KB Created: 2020-08-16 16:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 268762bbc9c471afd44b6861196f1068 SHA-1: 52d9dc5e33e95c959689324d8b8039f397ff92af SHA-256: 31064e31daf91cd26ff265d4dbf3df055ec3d33b5f47cd7dca24bec18e313829
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.ru. This suggests the document is designed to lure users to malicious sites, potentially for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of links and the redirector URL indicate a malicious intent to direct users to 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.ru/pify?keyword=php+ajax+contact+form In PDF document text
    • http://files.cjstuf.org/uploads/1/3/0/7/130775679/9910796.pdfIn PDF document text
    • http://files.samanthakreuscher.com/uploads/1/3/0/7/130776695/d88dbe901b96e0e.pdfIn PDF document text
    • http://files.colonialbakerynj.com/uploads/1/3/0/7/130776536/kurojo.pdfIn PDF document text
    • http://files.documentsresearch.net/uploads/1/3/1/0/131070619/gonezi.pdfIn PDF document text
    • http://files.mchsapchemistry.com/uploads/1/3/1/4/131406234/vopikexatemixox.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/1/0433/2702/9400/files/lp_antepartum_bleeding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/gitekibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/writing_task_2_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/dezowak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/zakib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/piromavuwezorapikenoxipig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/mixubawopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7237/0326/files/49892959539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/bharathiyar_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/abiotic_vs_biotic_factors_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/60432748262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/agenda_2020_editable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/dijexewawudutezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/discord_voicemeeter_banana.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEA 5188 bytes
SHA-256: 2866a8c694c28fe7708b4f15bef434a128af040b09524a100cf760fc85134ff0
font_01_sfnt_off00008069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8069 10708 bytes
SHA-256: 022bb94ef313fd5463a9aecd0aa9951d980a232fb07b70c9fd60e7157c2cf315