Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa1d4490a8b3360…

MALICIOUS

PDF

42.6 KB Created: 2020-08-18 19:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a8e1c4569a3c566c25a61dbdf6807cc SHA-1: 45109f61aa48ac4b7a898707b959b76a26e2234f SHA-256: 4fa1d4490a8b33604149c17f640a125950874e3ff9f7f83355e54e63ef4c0c3a
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link pointing to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'free sheet music christmas carols' and the malicious URL. The primary attack vector appears to be social engineering through deceptive links within the PDF, leading users to potentially malicious 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.ru/pify?keyword=free+sheet+music+christmas+carols In PDF document text
    • http://files.dirtypawprintsaussies.com/uploads/1/3/2/6/132682295/jinubepedowivu_lorut.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/1/0429/7300/3939/files/mcdonalds_training_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/3723966506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4109/4817/files/64762281371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/xagiwarufulogak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/nunekasenitujoxuwes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/74499021422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9930/files/akaike_information_criteria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/17146652408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7002/1014/files/2150835234.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 3

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_off000062c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 4992 bytes
SHA-256: 30a44580cbf4ddc8acd35914e07cbac44a7311ec01b01b39a6aaf5d72f93f922
font_01_sfnt_off00007395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7395 13372 bytes
SHA-256: 7ba18a572148121ae9c3f021e5a7e39f22ff1d049a357b40f23788b6b86fdaa1

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