Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c375860d79791e…

MALICIOUS

PDF

41.1 KB Created: 2020-08-13 01:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3507a6aa6ca33e9835d6249feacfda48 SHA-1: 9a86a3612edcfee7a7107f32748da2d0a30537c1 SHA-256: 38c375860d79791e3ce964a6dfc65eaaa6fe220ed9249d492ffc32c7385b679c
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.cc. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the intent is to trick the user into clicking it. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=formula%20to%20calculate%20compound%20interest%20in%20excel%20worksheet
    • http://files.chapel-associates.co.uk/uploads/1/3/1/3/131383323/xomutivotabafekoda.pdf
    • http://files.mentionables.org/uploads/1/3/2/6/132681517/6ec62f398fd.pdf
    • http://giderof.royglobalized.org/uploads/1/3/1/3/131398560/zikafu.pdf
    • https://cdn.shopify.com/s/files/1/0451/4581/7253/files/54689213900.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/basic_english_grammar_book_2_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/2008_ford_fusion_manual.pdf
    • https://cdn.shopify.com/s/files/1/0447/9772/2785/files/tilewopebo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/90386721464.pdf
    • https://cdn.shopify.com/s/files/1/0437/3777/6289/files/albert_camus_the_stranger_french.pdf
    • https://cdn.shopify.com/s/files/1/0434/9493/2640/files/98113412095.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/12601947047.pdf
    • https://cdn.shopify.com/s/files/1/0438/1124/2144/files/mad_crazy_love_line_dance.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/93463880279.pdf
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/waterfall_model_example.pdf
    • https://cdn.shopify.com/s/files/1/0447/8962/9079/files/download_novel_arifureta_shokugyou_de_sekai_saikyou_bahasa_indonesia.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_off000060b5.bin
51175395fec367358dd60ece050cf1cb97ffcb6a989d17b678f7d00df56f3ef3
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B5 5492 bytes
font_01_sfnt_off00007348.bin
79053e55dcfa98f440159f315e1912ba54946b6cb19faf620c0484899521d899
pdf-font-stream PDF embedded font (sfnt) at offset 0x7348 10624 bytes