Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd7f1557421e112…

MALICIOUS

PDF

41.0 KB Created: 2020-08-14 05:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f7dde76534a8902e6fea644b894ffbe SHA-1: b89cfed123073ab76cb90b0d2ac6fe817a09d295 SHA-256: dfd7f1557421e112c044136f5c49cfbdb7c232ac892ab423e8267a163f36953c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=split+column+excel+sheet`. The document body, though heavily obfuscated, contains text related to 'split column excel sheet' and the malicious URL, indicating a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

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.cc/pify?keyword=split+column+excel+sheet
    • http://files.warwickpics.com/uploads/1/3/0/8/130814076/daribemodogiviliwake.pdf
    • http://files.lifeplanningretirement.com/uploads/1/3/1/4/131438068/beridoboxa.pdf
    • http://dufof.oerv-rettungshunde.com/uploads/1/3/2/7/132740424/zelifi.pdf
    • http://files.jimmyleezuniga.com/uploads/1/3/1/6/131606121/xuvameso.pdf
    • https://cdn.shopify.com/s/files/1/0435/6312/2843/files/86358124703.pdf
    • https://cdn.shopify.com/s/files/1/0430/3516/4835/files/xajunoxigabetovejijudul.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/falalezuguteper.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/papasuzujuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/acca_f5_question_bank.pdf
    • https://cdn.shopify.com/s/files/1/0432/7371/5880/files/lerekibagomufaxogizesev.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/91903850495.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/free_gold_glitter_background.pdf
    • https://cdn.shopify.com/s/files/1/0439/8209/4494/files/fonzi_m_asphyxia_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/442347716.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/oxford_dictionary_of_sociology_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/59518134477.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/vekizedeluguxof.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/62847344273.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_off000062f6.bin
9eff77831488a196751442120df5f91e2b8e745ab8ef1ad47dadf4076c0a9117
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F6 5036 bytes
font_01_sfnt_off000073f2.bin
8425b7a3383ba1cf6c76827fb38c6f3d8073705a1d6a27acf933807958b3902e
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F2 10316 bytes