Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a60fc9a5e525cf…

MALICIOUS

PDF

37.2 KB Created: 2020-08-10 23:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd69fe98374d5484632fdd55021fdd87 SHA-1: b00830d76470dc55bb03c55c0461b61b8926b69e SHA-256: 27a60fc9a5e525cfae17ab8f43cd699b8f5bbb51cb446581c7622e0a28bbf64c
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely to improve search engine ranking for the lure. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=albert+camus+pdf+download
    • http://files.lauramartier.com/uploads/1/3/1/4/131437504/6130854.pdf
    • http://files.trevorlakecomputers.com/uploads/1/3/0/7/130738562/xaruvukamodexenojis.pdf
    • http://leseru.inquirybuddies.com/uploads/1/3/1/3/131383965/6578924.pdf
    • http://kukewe.heacham-minors.com/uploads/1/3/0/8/130813612/vajotosibege.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0436/6719/4021/files/48180968647.pdf
    • https://cdn.shopify.com/s/files/1/0428/3842/5767/files/revixurimadozetatorigiba.pdf
    • https://cdn.shopify.com/s/files/1/0433/3666/3208/files/37588090541.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/the_brothers_karamazov_by_fyodor_dostoyevsky_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/romeo_and_juliet_act_2_study_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/96179023027.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/26329823792.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/84544884587.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/zotilumulowebub.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/jududuwitumedenofatuniz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/mibifufaxokitepukuzumiron.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/8563941719.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/xalewizi.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_off00005320.bin
5130d9ddf4a8ce0dfad8ed2facbc62e6d10b21a6984693e627ef3c6d1313ab04
pdf-font-stream PDF embedded font (sfnt) at offset 0x5320 5520 bytes
font_01_sfnt_off000065d9.bin
da8c5ef495f6d733ce93ebc9623926f1237de77ed9e91b3375c6c0c478ed6b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D9 9864 bytes