Malicious PDF — malware analysis report

Static analysis result for SHA-256 85abcb8e7725b945…

MALICIOUS

PDF

46.6 KB Created: 2020-08-07 08:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 385213c0c91a690c67bee1a6ce142827 SHA-1: 81b619a698ce27a73891899db0a8aed08b1752dd SHA-256: 85abcb8e7725b9456005da462daef2ea670696fdab2f5f59e6d9d6750c05dbd5
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text and URLs that suggest a lure for users to download what appears to be a PDF, but instead leads to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=varicela+complicada+en+adultos+pdf In PDF document text
    • http://xuxofa.grantstelephoneclassics.com/uploads/1/3/1/1/131163635/nupasikod_fokuniri.pdfIn PDF document text
    • http://files.beacontheatreworkshop.org/uploads/1/3/1/3/131383664/cee3c5.pdfIn PDF document text
    • http://files.andrewbixler.com/uploads/1/3/1/4/131453053/ab784de509.pdfIn PDF document text
    • http://files.growingwithbrock.ca/uploads/1/3/1/3/131381374/8586130.pdfIn PDF document text
    • http://files.catrinatenganartistry.com/uploads/1/3/0/7/130738696/cbbab214db61.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/1/0434/7346/9597/files/dukakogunenaromokilefeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48465164240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8507/8434/files/19561998360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/tutejaxodopotetizoras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/voxexodufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/equality_and_diversity_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/16338595687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/73534576938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/29233708743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0784/8096/files/rules_of_active_and_passive_voice_with_examples_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7844/9307/files/276339546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/tutorial_carding_amazon.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_off00007696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7696 5264 bytes
SHA-256: d876152c944156058d012b6b3f5e9bfd65ae82430ccf1eb7139a13a96513681d
font_01_sfnt_off0000886a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886A 10708 bytes
SHA-256: 700b3bc1e7b4fee0c9af1aafdefd5256139e35edb9ab7402474e06f0faa3d63d

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