Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ffdb89c3bb03f5f…

MALICIOUS

PDF

45.9 KB Created: 2020-08-31 13:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f90d99973f2e1e757a3b580affcb49e0 SHA-1: 35f8bf9a6556feb96f8b7dcec71fd22d88d99682 SHA-256: 5ffdb89c3bb03f5fe0b3f40d08a60dde5f49105ccba345390e39d838a0c70afe
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text that appears to be a lure related to game cheats, suggesting a phishing or malware distribution attempt. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector.

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.cc/wix?keyword=wolfteam+kurt+paras%25C4%25B1+hilesi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18491093394.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/beginning_programming_with_java_for_dummies_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/zoritasifikusugud.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/xiboveturalavusa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/bikopenisevob.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/kuparazebenubamazodifij.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/xevumebin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/algebra_1_volume_2_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_20ef6ccba5964ecfb694e2da3c44c52b.pdf
    • https://static.usrfiles.com/ugd/314c35_744b79915b81430085916f4622a48e04.pdf
    • https://static.usrfiles.com/ugd/b8c837_308bbcb111da4e6ebd05f5c33c41ef21.pdf
    • https://static.usrfiles.com/ugd/a91264_14802b19ee014b07af1827a1b7816b8f.pdf
    • https://static.usrfiles.com/ugd/09273f_04614d8d26f14837a5255cea3ac3e8b9.pdf
    • https://static.usrfiles.com/ugd/c345b0_7175e122373541c7b235b333371b36ba.pdf
    • https://static.usrfiles.com/ugd/6cfc61_56e3cb29524440f59b81e2a4784c1bb2.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_off000068ed.bin
d80b84ae097a9dbee5e93ad9f9b5de618d14082a8c98c31c028db43c66648f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68ED 5252 bytes
font_01_sfnt_off00007aa9.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA9 1800 bytes
font_02_sfnt_off00008337.bin
b62ce50d83096907d5c0804301e8eaa2ca8e8ba5f031b144a3fb8c04f2e60776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8337 12092 bytes

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