Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4f87d7af5dee43…

MALICIOUS

PDF

50.3 KB Created: 2020-09-12 04:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e58cb8a197f0490d98c29fda4bad77f3 SHA-1: 85b305bad6a2a994266fd9fec454f2e53d5ab8a8 SHA-256: 6c4f87d7af5dee43915baefdb2e2f0584d7481d10bf80488cbb2ff8f05debbf0
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains a reference to the same redirector URL, suggesting an attempt to trick users into clicking it for song downloads. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=naa+autograph+songs++teluguwap.+net In PDF document text
    • http://gikugukem.cobbosseeconteesnowmobileclub.com/uploads/1/3/0/9/130969521/6c423cf50a18a.pdfIn PDF document text
    • http://files.rjbcrafting.com/uploads/1/3/1/6/131637108/tufif.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://static.usrfiles.com/ugd/1decf9_b3c696fd261347ab9c23bbe306eb63ef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c02035af460e4bfc92c6e51eb577c4a0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ea9bdf_9432b0b49d99400289df644dd85dea81.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b914b5_ba9e18c8670f4c7788adb6e6dfcfbc26.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d5d855_69c4b6a14ff7400da4b89d58b30461f2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f5892c_eca578c5d2414da3baa7817579fc04ed.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6846fe_f33362d2736a4139b16fc69984c7c0b1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9b33c5_6280e42ae2394643a0342501c0db9d17.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d3758e_57e34e425c394d5d90cb3634d2563b9c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d6b5da_ca903834666e4140b0decdf9be73d9c9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9c43ec_f05f205076ef47d58d674eed0ec389f2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2df67ebf33d145a4a7d7626fcc6d1c51.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/11276f_763a62fb2639406b94a4a029a62985c5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cabbb_6285b8426dcc460c8c426f81033f6a08.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_off00007797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 5008 bytes
SHA-256: 10a1d887ce7e9f7b2e747e1c202ed8509a35709fb6d8f1538c728c57653e0fa0
font_01_sfnt_off000088b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B1 11512 bytes
SHA-256: 0ab135dca3048107b44e3da2ff7b7765719284e1744caba500e7fb18e14a128b
font_02_sfnt_off0000ae50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE50 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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