Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0468417bae15f9a…

MALICIOUS

PDF

51.5 KB Created: 2020-08-31 10:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce8f44ea5c53bfba3786915e88ee5dcb SHA-1: 08cb3e4c660ae5307cce0f873d14936505075b9a SHA-256: c0468417bae15f9a3a847452d1a5f881011d2b5a1280eb3da0bbda6aa4936ca3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links. One of these links, 'https://ttraff.cc/wix?keyword=the+simpsons+in+real+life', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to 'The Simpsons'. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm or SEO manipulation tactic, potentially 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=the+simpsons+in+real+life
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/sejoturixatevizena.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/even_more_tales_to_give_you_goosebumps.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/fuzujolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/17925847806.pdf
    • https://static.usrfiles.com/ugd/5899d5_cdafa723204146dda4f756452c57ebd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_545d58b1651b46a18cf7f2d7318c0028.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/rudram_namakam_chamakam_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3521/files/nonilavipa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/67126882315.pdf
    • https://cdn.shopify.com/s/files/1/0430/8320/2711/files/sondan_ka_basama_0_dr.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/bifuzamelizagajukatesana.pdf
    • https://static.usrfiles.com/ugd/e4a001_7fddc1b4ae41460aa0733719d8abe6cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ff460a1e14c4c8c9458a8e6829bc181.pdf
    • https://static.usrfiles.com/ugd/cfa91a_987c98b980f8402d8d5c6db524816894.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0baa625869d476482b5754e6ae6e8d8.pdf
    • https://static.usrfiles.com/ugd/e1d12c_6341f600e27a4cb288713d4f3f148a7f.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007db0.bin
5dd443efe0445353136aa3116be6e4febe921885e56dcf692f522a62a14e9c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB0 4796 bytes
font_01_sfnt_off00008dba.bin
978882e69b7a7d6926bdc00a6c7dd2a027caa4967bfe7f7db41b6b7b94f7e5df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBA 11240 bytes
font_02_sfnt_off0000b326.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB326 4324 bytes

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