Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e52f5c896c1515b…

MALICIOUS

PDF

39.7 KB Created: 2020-08-07 10:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b3ac735e2d6f5e0e05e7a99390e668ff SHA-1: 18e731c4be0835ba0245bee432b8c0ddedd96910 SHA-256: 5e52f5c896c1515b6fa1655a155827487739e0fa3b9ea7dde9b2a3bdcf0aefea
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector infrastructure known for malicious activity. The document body and embedded links suggest a lure for free downloads, likely to distribute malware. The ML classifier strongly indicated maliciousness, and the presence of redirector links supports a phishing or social engineering attack pattern.

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=bansal+classes+chemistry+notes+pdf+free+download In PDF document text
    • http://fifobodub.doulasofomaha.com/uploads/1/3/1/4/131437812/9735949.pdfIn PDF document text
    • http://files.advancedanaerobics.com/uploads/1/3/0/9/130969555/davam.pdfIn PDF document text
    • http://files.eriedips.com/uploads/1/3/0/9/130969435/mulipuramunev-dufegatawikefiz-sexun.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/1/0433/5583/2469/files/hunter_x_hunter_149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/95429020573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/lawemosemegatatevubixeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/67870864727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/muwowukopejegaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5638/8506/files/search_fors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/mozimup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/40426846318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/porenutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/zazotagekotimavakinozuwel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/warowopiwotu.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_off00004f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2B 5428 bytes
SHA-256: a690fca94268092112cad15213d0cdb331a147873782f9fe9ded3144633cb79a
font_01_sfnt_off00006178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6178 9944 bytes
SHA-256: bef87f0e96e9199a04145cdc385aee28e261f53aea628bf4311d06fcd8cd80fb
font_02_sfnt_off00008392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8392 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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