Malicious PDF — malware analysis report

Static analysis result for SHA-256 c158f9bb163b0391…

MALICIOUS

PDF

44.7 KB Created: 2020-08-20 13:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af4a333afdc9c58614af3b932e42d1e4 SHA-1: 13287d388685457f871f0b18d4246ab530d9f91a SHA-256: c158f9bb163b039157d28df7603dad5bb6d4bdbfa6b91587c513eafe54976898
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.cc', identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Warrant of arrest sample pdf' and the same malicious URL, indicating a lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=warrant+of+arrest+sample+pdf
    • http://somone.suzannetank.net/uploads/1/3/1/3/131398008/c2c2ef6e280.pdf
    • http://dedape.bronxbash.com/uploads/1/3/2/7/132710567/xeguxofatezaloworat.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/3183148597.pdf
    • https://cdn.shopify.com/s/files/1/0430/6170/6903/files/gipavatedutamur.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/approach_to_hypocalcemia.pdf
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/88047542875.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9783/files/23098995821.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/petum.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/kaxep.pdf
    • https://cdn.shopify.com/s/files/1/0432/1620/8036/files/48616870003.pdf
    • https://cdn.shopify.com/s/files/1/0434/0665/5642/files/96491771182.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/8754838709.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/sample_business_case_template_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/leasehold_advisory_service_advice_guides.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/wiromubod.pdf
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/87880817030.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1702/files/16217948319.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_off000064c9.bin
d421d88a7d0a026e357b97fd76af4e7e76c2d2f059a6f8bb3dd050641e0e1ca2
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 4940 bytes
font_01_sfnt_off00007581.bin
81bc49506a454a5e2e9c36bc978a965c613fdbf5db218fe89a2312570b2ff424
pdf-font-stream PDF embedded font (sfnt) at offset 0x7581 9848 bytes
font_02_sfnt_off0000972b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x972B 4324 bytes