Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b802356a9722d4…

MALICIOUS

PDF

44.0 KB Created: 2020-08-24 09:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52d439755039e45acecf554f6e153ff9 SHA-1: 1c345793b566ad6880533df3f5edee92393bb30d SHA-256: 85b802356a9722d43a83a72a0d57fb323fb2ef5083e50df0e526ed05db7f7c9e
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or malware distribution attempt. The ML classifier strongly indicates maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lead the user to malicious content, likely disguised as a guideline.

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=inhaled+corticosteroid+doses+for+nice+asthma+guideline In PDF document text
    • http://gepofin.lavidawithwings.com/uploads/1/3/2/6/132681946/paneded.pdfIn PDF document text
    • http://files.delilahfayeart.com/uploads/1/3/1/6/131607522/rakamobexavan-bepofabadexe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/6993290568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/mcquarrie_statistical_mechanics_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6853/7497/files/tijanamaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/52496347387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/limezoxuravevudepejav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/nomenclature_of_tricyclic_compounds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/bunipiwaniselisizenuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/dekoduve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4098/1660/files/zuvupodaz.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
🗂 Part of campaign: delilahfayeart.com 4 samples

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000609a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609A 5252 bytes
SHA-256: 51b83b5021f7ca1a5065d5ee42973baff636ebfeea85b01486910153f0acea40
font_01_sfnt_off00007232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7232 10212 bytes
SHA-256: afba56fb800b4cd04099a9d947c402596e705fc5351ed1d1c64026d0770f1782
font_02_sfnt_off00009522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9522 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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