Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8f24013df8ab1d…

MALICIOUS

PDF

47.6 KB Created: 2020-08-29 09:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33a5d7afbf5aa414a993fc60327ef64b SHA-1: ed879f43c49767e7e530aa80e4a8b49e821d3b8e SHA-256: 0d8f24013df8ab1d807afe80f8562d73b6845b7950e25591fa6b8841e59fcbcc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=irobot+roomba+reviews'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign but likely used to mask the malicious one. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to trick users into clicking it, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wix?keyword=irobot+roomba+reviews
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_6274f12b50da40bb8e6f7fc642afa0eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d639c7a310d48d2853b321422d04f5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_eae511e1d280401e82e865bf8488f0b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_616489f646b44c4f97f250f1b4d87860.pdf
    • https://cdn.shopify.com/s/files/1/0447/4735/8362/files/benalmadena_mapa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6219/8425/files/98765313587.pdf
    • https://cdn.shopify.com/s/files/1/0435/7819/6129/files/hurt_feelings_report_fillable.pdf
    • https://static.usrfiles.com/ugd/b8c837_42a66ad919d34360ae6ce3c67c1ee1a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_8298f1fa6bdb441c93f0ece271c65248.pdf
    • https://static.usrfiles.com/ugd/b8c837_33e1cc63d4504eafa87113d5abcd29bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0b3807b14c94c9fa715a33e438e03cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_90b894dfaf584e44b82e71d2bf24d862.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab9db38fb5644a29838bdffd6e1e4643.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1a18a5a3042493ca7f82941cbdca950.pdf
    • https://static.usrfiles.com/ugd/b8c837_669cf7f73d7d47788a173a295d4e4d50.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d82.bin
535a1234987412f971b58ccb44f52c914c3fbbd97996933362da4f46b029ac0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D82 4712 bytes
font_01_sfnt_off00007d8b.bin
59021c17d47563945ce7e3acac87244ce3a4ce4f2ae8014561aa0ad0798982fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8B 10560 bytes
font_02_sfnt_off0000a18b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA18B 4324 bytes

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