Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b660abed7f32bd5…

MALICIOUS

PDF

48.4 KB Created: 2020-08-08 06:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d60f9481e548749fcfe65e854dd8a6b SHA-1: 267343d339234facd21df48e7634557d6c888882 SHA-256: 4b660abed7f32bd5fba0e79306cb38382008a5e074aaee9f8cd1da596a072ea8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. This suggests the primary goal is to trick the user into visiting a malicious website via a seemingly legitimate link.

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/pify?keyword=baghouse+filter+working+principle+pdf In PDF document text
    • http://files.justacatlover.com/uploads/1/3/0/7/130775427/0249150.pdfIn PDF document text
    • http://files.theamericansixties.com/uploads/1/3/0/7/130738565/9a4eb453c5b.pdfIn PDF document text
    • http://files.queenskitchencatering.com/uploads/1/3/1/4/131453124/3468814.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/1/0431/0820/4701/files/zikuxadulog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/93578377924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/kulirovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6154/1014/files/tuwafekudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3315/7014/files/australian_super_letter_of_compliance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/mawegetifixuwiroberu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/mosatepopuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gimuwuwizarisatin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2783/9641/files/nadosuxevewamunukor.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 6

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_off00007f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1A 5624 bytes
SHA-256: 06f8d8f4caf7f38171144d55ad4a958729d60621fb8169c9cf2708fc73777bbf
font_01_sfnt_off0000924e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924E 10004 bytes
SHA-256: ba4654db22c8f6063ca4cda788c3cc0b1a7b1a2a1aafb364a268a245608a12d4

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