Malicious PDF — malware analysis report

Static analysis result for SHA-256 40924c55541f3ea8…

MALICIOUS

PDF

33.6 KB Created: 2020-09-16 17:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a59181332715d3659063328d6cd8854a SHA-1: d2dcc7db16f1b7fff1b1f7536b505b6374f35b44 SHA-256: 40924c55541f3ea8f92d7b31ab5747a846215f867b47b0d59f955534d3e4e81c
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.club', which is used to lure users with keywords like 'lg tone 750 manual'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URLs, reinforcing the intent to redirect users to potentially harmful content.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=lg+tone+750+manual In PDF document text
    • http://radok.findinggodspeace.com/uploads/1/3/1/6/131637136/2ba51a6cd9eb.pdfIn PDF document text
    • http://woropi.d2studios.com/uploads/1/3/1/3/131382134/mededojomuvof.pdfIn PDF document text
    • http://files.thealynnpaul.com/uploads/1/3/1/8/131857334/wafasigokikimeb_xexalemewaji_zutuzum_nudatuvima.pdfIn PDF document text
    • http://files.exmouthcaninecentre.co.uk/uploads/1/3/0/8/130874128/jenasaj.pdfIn PDF document text
    • http://files.cthnrg.org/uploads/1/3/1/3/131383825/f700e384.pdfIn PDF document text
    • http://files.burienfire.org/uploads/1/3/0/8/130873728/kazesezeguxetexawin.pdfIn PDF document text
    • http://zabapejal.bostoneverafter.com/uploads/1/3/1/4/131453540/056e208151d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://100f9c69-339d-41b6-9add-2c4fd10f3b7f.filesusr.com/ugd/7d1dc9_992c3b01b79c426898a28ff707358959.pdf?index=trueIn PDF document text
    • https://508eccaf-b775-4a65-8006-065b8957adb9.filesusr.com/ugd/b0c717_abbaf54eaf7d41c59d6c3acaddce8e3e.pdf?index=trueIn PDF document text
    • https://a1f9a26a-b533-463f-a0de-4da65c206d09.filesusr.com/ugd/64bd79_14569f1b5fca44fe8a695ac1251fa7ee.pdf?index=trueIn PDF document text
    • https://5894932a-7a63-4816-86f5-2528a3d996be.filesusr.com/ugd/73c254_0597ffba03fc495285bcd9fb58ef84fb.pdf?index=trueIn PDF document text
    • https://1c87a797-44f4-43a6-aa1c-6575f2e57526.filesusr.com/ugd/e643da_9f5351e8cf23480c9f0600744db2524e.pdf?index=trueIn PDF document text
    • https://65bad77f-1481-4ac8-bdb9-14be1b53e3b7.filesusr.com/ugd/227d0f_2325a402355d43899647abcd79d4cfc6.pdf?index=trueIn PDF document text
    • https://4ec534c0-4a35-463d-9443-78c11f216302.filesusr.com/ugd/3be3a7_41e6655c48694a1aba93cea12a98517f.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4719 5016 bytes
SHA-256: d8701f2fc030f801a5f834ba18dd18c54af80060d956887117f35aa77598bf52
font_01_sfnt_off0000582a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x582A 9932 bytes
SHA-256: 138cc9b1c5f72f0a87e93cad75cbea6cbcd168d6794b9b464118004a04195a46

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