Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f56098d9e15f234…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 05:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34911cecd21d8811a30f30e03136bc57 SHA-1: 8fec46b86f1dd096f1a82e74d9b4e2412e503383 SHA-256: 0f56098d9e15f2340f9d5d5041d74f9982ce51fc8447a1ff37b0d9c6000037a4
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, 'https://ttraff.cc/wix?keyword=hbo+game+of+thrones', which is likely used to distribute further malicious content or lead to phishing pages. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are benign but serve to obscure the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=hbo+game+of+thrones
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/73cb9e_311f499e54804819afb55916ea39d9b7.pdf
    • https://static.usrfiles.com/ugd/5b9365_4c29076dbbd8401ba7a009a531282608.pdf
    • https://static.usrfiles.com/ugd/a4e402_c61d854d2794493a98c1926f77223bd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3107dfe9b730412ba74a3e62a761ee0c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/epidemiologa_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/71289352088.pdf
    • https://cdn.shopify.com/s/files/1/0438/8736/2216/files/88624458528.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/76159574354.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/fitamuzuvo.pdf
    • https://static.usrfiles.com/ugd/d54300_50a55ac2f76d46e5a12db368652a0eeb.pdf
    • https://static.usrfiles.com/ugd/e5a943_913101d9ba0e4585b6cfa3d7ffbc3b19.pdf
    • https://static.usrfiles.com/ugd/544c7e_cac113672881424e8feb4cf8213a8add.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b6596033ebe41459a3f3a90c3985e06.pdf
    • https://static.usrfiles.com/ugd/10b11f_7a4f091481cc42b08664accb2a629ddf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8241/6281/files/siruthai_puli_tamil_movie_in_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7456/files/330159072.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/5052430349.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_off0000677e.bin
a289f4e41c229ccc534af5fc0e5d6cbd2b25f3699a997c94d56ce69e187a4291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 5252 bytes
font_01_sfnt_off0000793c.bin
ddbe02cb74ed2196cab520345cc6416865379f66de0b7f82069d23a8b25a3313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793C 10172 bytes

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