Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffb36744f35ede8…

MALICIOUS

PDF

80.1 KB Created: 2020-08-09 07:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dc162ff651759cf7a00ed7b75b05cc2 SHA-1: a7e7877c4ddaefffff74492e0e88946a75447a98 SHA-256: 8ffb36744f35ede85211027c10ffd62b466cc269767f053f6f733205a47b3fae
120 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 'https://ttraff.cc/pify?keyword=chemical+analytical+methods+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, a PDF link farm heuristic was triggered, suggesting the document is part of a larger SEO poisoning or link farm campaign. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious URL is sufficient evidence for the attack pattern.

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=chemical+analytical+methods+pdf
    • http://files.kruzadakali.com/uploads/1/3/1/6/131637190/zuvaregadamadofiguko.pdf
    • http://files.stjamesunitedregina.com/uploads/1/3/2/7/132740805/rapexowop_mapurimatani.pdf
    • http://files.donellestaples.com/uploads/1/3/0/7/130775084/dodetuxibu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6176/2455/files/48570685000.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/oxford_guide_to_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/tatidejegunulojudukepena.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/12622104327.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/77415762932.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/jukebox_crafting_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/angielski_zadania_dla_dzieci.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/kevavosusozijol.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/sevozog.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/15987410592.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/78189956350.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/83739543727.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/49295448698.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.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_off0000de63.bin
f8db2bf9e6b4d4c2aca4ff44c8e7f4c80cc635a7a52a272aaaca381f030b5b66
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE63 5304 bytes
font_01_sfnt_off0000f050.bin
0cd16ae7229211c57420562e4884028f1aec4fc27bd5989734d282fd833cc315
pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 13808 bytes
font_02_sfnt_off00011d3a.bin
d7a144dc1c39db2e342b3eddf6670e53fd5a753d1113886b636cb49c6016f33a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3A 16232 bytes