Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef0c4420d2c0aae…

MALICIOUS

PDF

63.5 KB Created: 2020-08-20 05:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9d6cbd8ebb0532af11545b001b2a94c SHA-1: 8ba75fdf713c60f7dfe2d99e03a2c2f6106ee22a SHA-256: 2ef0c4420d2c0aae77024221c4560c8eb9503eb4d07d5c0318231d3ae0d39e58
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially improve search engine ranking for malicious content or to obscure the ultimate destination. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=arquitectura+de+computadoras+segmentada+pdf
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdf
    • http://files.lansingplacemakers.org/uploads/1/3/1/4/131407135/75d97b577d4d5.pdf
    • http://toxaxu.chelseaniehaus.com/uploads/1/3/0/7/130776394/8480266.pdf
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/nagufovutodegixow.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/pasiwusifizagulek.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0899/files/30384120953.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9738/files/beach_buggy_racing_2_mod_apk_home.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/54472220150.pdf
    • https://cdn.shopify.com/s/files/1/0439/4637/7374/files/xutogurewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/medical_terminology_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/77455179113.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/jisoralemaxexus.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2190/files/jupoboledugav.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/the_founder_movie_questions_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/85231108570.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/beastie_boys_ill_communication_songs.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a655.bin
4811fd48a2cbd008132207a034b7685348ce5a0aa55601f80a6422e46fd189b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA655 5560 bytes
font_01_sfnt_off0000b91c.bin
319e2a86b352178732588f449d33fb238a9ccf38e08301a5abefb29d19312337		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB91C 18164 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.