Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbff1a692185e4b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 03:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bceb7e6353631d328f48cce5d494bcb9 SHA-1: 9d3681dc260fba19dd94204537e067055063209a SHA-256: cdbff1a692185e4b93935d63b418be06098144734ab1f38f5c745dbd39213989
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.ru/pify?keyword=anghami+plus+free, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a coordinated effort to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=anghami+plus+free
    • http://files.hankkellyartists.com/uploads/1/3/2/8/132814155/7607355.pdf
    • http://jujab.vapesauce.ca/uploads/1/3/1/3/131383652/3ae3d46bf.pdf
    • http://nuvepoveb.jlrodgers.com/uploads/1/3/2/6/132696398/2606893.pdf
    • http://files.ewb-ur.org/uploads/1/3/1/4/131483391/4927007.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/spontaneous_bacterial_peritonitis_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/dunetapiri.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/90978474026.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/fujamoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/seziwifalozevutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wulusiwebope.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/adobe_reader_password_protect.pdf
    • https://cdn.shopify.com/s/files/1/0447/4834/1399/files/quantitative_aptitude_questions_and_answers_for_ssc.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/absolutely_on_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/illustrator_save_as_reduce_file_size.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/88825325276.pdf
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/lumumoxonoboziwonugijun.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_off00004f82.bin
e185c28b31c3226ef95731e0e0019b65ad523aa7aed8222550c5094defd20fda
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F82 5304 bytes
font_01_sfnt_off0000615e.bin
1254fdeb38ca6410379b2c775caecdac689521ae028798b46b61b5cfc18e0347
pdf-font-stream PDF embedded font (sfnt) at offset 0x615E 10492 bytes
font_02_sfnt_off00008575.bin
1be7eb5a73e5c42b43b1e430d914ba1fec6893714c42a2482f1d58568ad107cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8575 16120 bytes