Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4abecb563403cad…

MALICIOUS

PDF

47.9 KB Created: 2020-08-24 04:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58ff25c27c8229dc2571035622c138aa SHA-1: 3844a16d9661bd206ec1100d554bfae8df6bab7d SHA-256: f4abecb563403cad4d174807a9f2078eae50ffb24f6b6a7a43edad5dde08869d
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that this link leads to malicious infrastructure. The presence of many external PDF links suggests a link farm or SEO poisoning attempt. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, suggesting it was programmatically generated.

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=arthroscopy+instruments+pdf
    • http://files.woodworkslexington.com/uploads/1/3/2/6/132681772/lapiwig-lemurivelitaro-revapero-mukatomudugeluz.pdf
    • http://files.senecaflowers.com/uploads/1/3/1/3/131380258/4136797.pdf
    • http://files.apollosmartbet.com/uploads/1/3/1/4/131438449/xabuwojiponako.pdf
    • https://cdn.shopify.com/s/files/1/0437/5163/7141/files/12497571890.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/rewitetesekumipepejeto.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/analytical_ability_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3345/files/13854143695.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2357/files/bhartacha_ghatnakar_song_video.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/6248206700.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/27975509475.pdf
    • https://cdn.shopify.com/s/files/1/0433/3033/8966/files/intravenous_calculations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3768/files/estadistica_descriptiva_cordova.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/dativifugedemo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3689/3599/files/losefozibujasagekobus.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/20156692245.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_off00007057.bin
a9732668ebadd379514c01902120ec4d198d4d60b2fab482db792cfbb72c8d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7057 5244 bytes
font_01_sfnt_off0000820b.bin
8a757ce7d79dd3ef2fcd8049fb13f087c251447a77a66d9757d56f909981d6b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x820B 15204 bytes

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