Malicious PDF — malware analysis report

Static analysis result for SHA-256 185448f824c6fd30…

MALICIOUS

PDF

45.3 KB Created: 2020-07-31 03:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b6ebfb48ee6dee2841e564135c804b7 SHA-1: 55e7cb26f4ce3822bc4f94ff4667859f04f6fcbd SHA-256: 185448f824c6fd304496aaf93b32d3dd6ce83463a5320a0b1628bc2a352f8963
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, suggests a lure related to a 'Veins of lower limb pdf' download. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to potentially 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=veins+of+lower+limb+pdf In PDF document text
    • http://files.koehlerchronicles.org/uploads/1/3/1/3/131379040/673154.pdfIn PDF document text
    • http://files.bullswc.com/uploads/1/3/1/3/131380759/finekagepavere-retibeli.pdfIn PDF document text
    • http://files.hsc3knives.com/uploads/1/3/0/9/130969243/a00465f049b.pdfIn PDF document text
    • http://files.mississippimudkennels.com/uploads/1/3/1/4/131410747/b60a8a.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/1/0437/5147/3303/files/juvifopagopenala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/fokizuwirezikisede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/56952515707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/kupije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/8209899705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6728/4383/files/34498703551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/govufol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/xifawasesopagug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/30053230002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0568/8483/files/tazojizirojadugisalom.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_off0000770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 4884 bytes
SHA-256: 65eb72fe207c9ac6fb007b7d8ab6c2f1a63564bb2b28abf2412c8d42186d8b7a
font_01_sfnt_off00008787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8787 9632 bytes
SHA-256: 89a5b3dd771e4c7eb74e0353135f0c53dab4b1e62d0fe58f81176347a9318915

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