Malicious PDF — malware analysis report

Static analysis result for SHA-256 729d9a12fc2352c6…

MALICIOUS

PDF

38.5 KB Created: 2020-08-06 11:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77dc31d0fc7587d29d32de757887e8ed SHA-1: 115caedc216ae7ec89263c8a845dd5fe891af520 SHA-256: 729d9a12fc2352c64a8517e8e695b0f42f6968498ca136c3d9f8d5e318d47471
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service known to host malicious content. The document body and embedded links suggest a lure for free downloads, likely leading to phishing or malware. The ML classifier strongly indicates maliciousness, and the presence of redirector links confirms a malicious intent to direct users to harmful sites.

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=cambridge+english+grammar+and+vocabulary+for+first+pdf In PDF document text
    • http://files.infiniteaction.net/uploads/1/3/2/8/132814967/kasaliwewenepuva.pdfIn PDF document text
    • http://files.limocleveland.org/uploads/1/3/0/9/130969430/3f8b0fb6b1b3.pdfIn PDF document text
    • http://files.goodshepherdreading.org/uploads/1/3/1/6/131637606/tagegomo.pdfIn PDF document text
    • http://files.oasischurchaiken.com/uploads/1/3/1/3/131398374/napojabibo_pepig_vuleno_bozagu.pdfIn PDF document text
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.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/1/0435/4415/0165/files/vodotefoluzepokewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/genius_training_student_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/avalon_high_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/42507486129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/hosting_website_on_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/hack_someones_snapchat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/gatovofowex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/occupational_exposure_band.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6336/9125/files/85905272610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/5863228771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3422/9406/files/revolenet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/zukiwawuxeteniduzib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/sinun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/menuzatewobelomop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/us_ntp_pool.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_off000056b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56B2 5776 bytes
SHA-256: 875189f20b679d4c51992898275a60dcaafdbe1e0cf25620f94e7638d9216fe7
font_01_sfnt_off00006a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3A 10076 bytes
SHA-256: f0779715067f52b8be4c1c4b140a459e2197ffa6b8c166c34e6818ceb4ad9e3e