Malicious PDF — malware analysis report

Static analysis result for SHA-256 111df3b9cb71a3b8…

MALICIOUS

PDF

80.7 KB Created: 2020-09-12 09:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddc86e6fc42ba9a8069609305557c50c SHA-1: f8b5166eac622a5f97ca52c1b64c8bddfe269db7 SHA-256: 111df3b9cb71a3b8a665056cda1660893e1ae8ded445508f3e18f02ac687ac89
194 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and an advance-fee scam lure. It embeds numerous links, with one pointing to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of the scam. The presence of embedded links and the scam lure strongly suggest an attempt to trick the user into visiting a malicious site.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/wb?keyword=anterior%20segment%20dysgenesis%20pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a18aa6_2dee9428e82d4988afc101161e92fa72.pdf
    • https://static.usrfiles.com/ugd/607883_5acf60c2bfe84d31a3cdb5c11d373d90.pdf
    • https://static.usrfiles.com/ugd/b28561_f0ec77bbfd8745a8be8c32a0a2a763e5.pdf
    • https://static.usrfiles.com/ugd/8b2c09_ff588a3b64dd4718ac36030d046972c6.pdf
    • https://static.usrfiles.com/ugd/a51aec_0981872df69c42ef82bcf37044f12a9d.pdf
    • https://static.usrfiles.com/ugd/5ea4d5_07ed98ec6a0f42349a5f326fc4005152.pdf
    • https://static.usrfiles.com/ugd/5b604d_2bb4004f5b9945bd8f70062a2285afba.pdf
    • https://cdn.shopify.com/s/files/1/0428/8629/9815/files/nenukebulugakobemenu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/blood_test_types_list.pdf
    • https://static.usrfiles.com/ugd/4c7633_73d907b7e019402aae71562242dfa3f3.pdf
    • https://static.usrfiles.com/ugd/f1c748_180b7f4209c940a78be7763c55e3bd3b.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_337c40f2b24a4140b05275a792cff2d8.pdf
    • https://static.usrfiles.com/ugd/b28561_46fafb0977b5465ca49bfcd327f078c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_aadeb2e488894cd59f939b3042c55c3f.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdba.bin
60da56c89795c665c7e3303b3a527989d2d097145fe8c83cf02f45e2ba273f82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 5212 bytes
font_01_sfnt_off00010f70.bin
6749664508699688d7036de162c226dd58e237ea57edd76cd29e40926ac9b3b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F70 11440 bytes

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