Malicious PDF — malware analysis report

Static analysis result for SHA-256 754afcba42924ce9…

MALICIOUS

PDF

45.8 KB Created: 2020-09-10 21:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 272bea37fd6fc0a080447a2e31e395e0 SHA-1: 420bb81039192d33159d3c28b3bc0f17c6743099 SHA-256: 754afcba42924ce91eb987e6d1595194db3077646e17b4f7edb6d7d917d889da
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=blue+chips+movie'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into visiting a potentially harmful site, likely for phishing or to download further malware.

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.club/wix?keyword=blue+chips+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/affaa6_ccf8ef8977f54ca282afc056e7052988.pdf
    • https://static.usrfiles.com/ugd/b8c837_b321b21320a64d7cbcbbbf065576e80b.pdf
    • https://static.usrfiles.com/ugd/5cf23b_94d9e372894d41fb8b4dfe49fa16aa95.pdf
    • https://static.usrfiles.com/ugd/6e13d9_91f36b471e68400e9049841d27f1bbfc.pdf
    • https://static.usrfiles.com/ugd/b8c837_90377477b0904e5ababda945b3dd6dce.pdf
    • https://static.usrfiles.com/ugd/64f9d2_31b1cfbed07e4a528c5626b86ee150d1.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_dcfe1108ac8041798535b0abcb520d62.pdf
    • https://static.usrfiles.com/ugd/f65175_b58ae4c1c97b45f49e8b916ca1a25000.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/11242183957.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/89990742691.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/familia_bacillaceae.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/miwibewitusonezid.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/91273324425.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/mukutobizojame.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/tubunisezagupijola.pdf
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/90273680151.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1447/files/daylight_transportation_tracking.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_off0000750f.bin
b22b45b3dbbc66f9e7ee5792e53b517c90cd22e1eca44f85d8c47bf521e2d3ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750F 4976 bytes
font_01_sfnt_off000085e2.bin
af022474022850c96554190b3c9e4ba228aceb880042cf54041df42cd82578d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E2 10704 bytes

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