Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb8eda913fc66af…

MALICIOUS

PDF

80.8 KB Created: 2020-09-08 09:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5442d90b3ba41364e055c751f7d417bb SHA-1: de11fd6795da4c6361d759a0507e28600a779bf4 SHA-256: cbb8eda913fc66af8c085112a4e99633cdc097b9ca0e2a921f4184ed816f69f3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary attack pattern is to lure users into clicking malicious links, likely for phishing or to download further malware. The presence of a link farm further supports this, aiming to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.me/wix?keyword=azur+lane+formidable+wallpaper In 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/e8506d_a8156e754f4f4b1687e38554a5d06649.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b4172_a376773521bb4134a1404ed3835ff414.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bb3bf9_bcbdbabece0a45e792bc09c42d9354d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1715bf_0a3876be00384093a8dcc78522b5799e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d5cf39_c13eca50134746a89707eeb08471df87.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3d0627_e783e353592142e08f609de4e655f958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0033/8331/files/balefewixusovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9197/4557/files/wallpaper_girl_love.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_309a309bfe6143808f7624433e6b85f0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9421c8_4064ccb6f82d4169a4c1f55a65008a69.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f65175_b1a251e7e1e64983b4bbe4432783eb8d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD425 5084 bytes
SHA-256: 21e87bb50f9092e2484af92d4f235c7f3e8394d613e91fa7d0ed6a9a634a65aa
font_01_sfnt_off0000e558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE558 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 10280 bytes
SHA-256: ee71b9104bb2b75f8e3a5a21ff70ef14060bfbc99762407b99005d322764b08b
font_03_sfnt_off0001113f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 16660 bytes
SHA-256: 5c37151e58b57006fec45205b953024960161fc126972448518f450544b1ac12
font_04_sfnt_off00012772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12772 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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