Malicious PDF — malware analysis report

Static analysis result for SHA-256 c252b3bc8d017041…

MALICIOUS

PDF

49.1 KB Created: 2020-07-30 21:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebf0219aecedf173acece941250d1e5e SHA-1: d400159c35434015c883cc9d87700bd60499af39 SHA-256: c252b3bc8d017041937d24c0cfb69109d6e350eb78ffd0832723ff3610626fde
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, with the dominant host being cdn.shopify.com. The document body, though heavily obfuscated, suggests a lure related to 'pesticide formulations'. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=types+of+pesticide+formulations+pdf
    • http://files.kims-quality-daycare.com/uploads/1/3/0/8/130814687/kulinejonu.pdf
    • http://files.harambeepasadiafestival.com/uploads/1/3/1/0/131070362/7551580.pdf
    • http://files.themedigap.shop/uploads/1/3/1/0/131070309/4ac7f724bfe0.pdf
    • http://files.kims-quality-daycare.com/uploads/1/3/0/8/130
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/jometuvovakomezorerik.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/4766051859.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75320426607.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/baninalujuvogixunizopoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7206/files/93719891737.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/35170059662.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/banaxufe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/58161099932.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/30784294963.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_off0000819b.bin
4fa90151ea8e17e678c97de14a7d909ae9634ab8fb5fe70c8fffd09b2e4233b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x819B 5232 bytes
font_01_sfnt_off00009354.bin
bf95f78bc5188b1d0ec9d9757022e07073a27fd0824f89fb09ba6808d9d734a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9354 10740 bytes