Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4bdf9512b7430b…

MALICIOUS

PDF

43.2 KB Created: 2020-08-03 19:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf09253834dd43faa7c4550fddf3204d SHA-1: d3abe95a4e54c29292f00f2374ab7e3e308d9a0a SHA-256: 4e4bdf9512b7430b3ac194f6f5fae2f4436249748397857f5bf51ab3303e2de2
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The ML classifier also strongly indicated maliciousness. The embedded links likely serve to redirect users to malicious sites or download further payloads.

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=the+good+morrow+explanation+pdf In PDF document text
    • http://files.juliakellerbassist.com/uploads/1/3/0/8/130813357/xinefox.pdfIn PDF document text
    • http://files.intelekia-law.com/uploads/1/3/0/7/130739016/5452318.pdfIn PDF document text
    • http://files.whitthavenphotography.com/uploads/1/3/0/7/130739731/pajuno.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/1/0432/4818/9603/files/zorir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3088/9126/files/75644838961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6023/files/34654194149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/xixajuwidosexuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9208/0795/files/73820362136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/vetanudidivemugidawogom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/6441533237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/74529186373.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 4

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_off00006ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA5 5384 bytes
SHA-256: 277b8a6b14ce13b38dc6ca4ae6cdba7c8000e2291c82bf0c8465a388bf2fe6ce
font_01_sfnt_off00007de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE3 9940 bytes
SHA-256: 41d2a04ac605fa14940f51b5f5650760c30af36ad7fb4d88976156bbf52660b0

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