Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11d55731bc272f3…

MALICIOUS

PDF

45.4 KB Created: 2020-08-08 10:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 300033d1e4999cd37ee6b3b2b4e7b7b0 SHA-1: d5bbfd7206d6650fcdef1681a5da872f99d49c80 SHA-256: f11d55731bc272f33c18a81c25ebfb60e6fcf5bd9651fd1d0a9145a90ece9902
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. The primary attack pattern involves luring users to malicious sites via these links, likely for further exploitation or credential harvesting.

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.com/wb?keyword=cancer%20broncogenico%20definicion%20pdf In PDF document text
    • http://files.jamincarson.com/uploads/1/3/0/9/130969831/cf63f7f.pdfIn PDF document text
    • http://files.roguevalleycavaliers.com/uploads/1/3/0/7/130776065/ce641c3c001a97.pdfIn PDF document text
    • http://files.pauwii.shop/uploads/1/3/1/4/131482853/8437075.pdfIn PDF document text
    • http://files.impactcdyouth.com/uploads/1/3/2/7/132740462/b8b5e9e49aea.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/1/0429/4351/2732/files/kelotasigekux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/66430885059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/95311385070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/29163924598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5969/1163/files/47427451666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/pwc_blockchain_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/50652146842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/fajuvumowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4430/5056/files/13914779587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/24185765427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/49779462399.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6409 4984 bytes
SHA-256: 4009cc6fae4f0be1f287645e39706797765c40368aacdebfdd834ad9a88cb0a7
font_01_sfnt_off000074fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74FB 11020 bytes
SHA-256: ac420ea39877b79860677f073629a6932c356ad7102a17eb3fb2ab046e6f4705
font_02_sfnt_off000098bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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