Malicious PDF — malware analysis report

Static analysis result for SHA-256 e495c627669fd71c…

MALICIOUS

PDF

39.1 KB Created: 2020-08-23 00:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0c668daf4e255ba8b2b587a475a45ff SHA-1: 3be62e3656ab3f3d9bfa79a82f248d7952b0eb78 SHA-256: e495c627669fd71cf77d8bb06df840fed76963be975e5a62f2a5a975b30e98a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=injury+report+los+angeles+chargers'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on cdn.shopify.com, suggesting a link farm designed to distribute malicious content. 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.ru/pify?keyword=injury+report+los+angeles+chargers
    • http://files.modernliving.website/uploads/1/3/0/9/130969054/8553187.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/79146948806.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/gorujavajere.pdf
    • https://cdn.shopify.com/s/files/1/0436/0844/0990/files/20307911429.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/64004748341.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/vevilenita.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/reducing_size_of_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/pepopupabetasobuto.pdf
    • https://cdn.shopify.com/s/files/1/0430/8625/0137/files/nios_assignment_front_page_image.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/10208357192.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4835/files/retinitis_pigmentosa_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/jukedilojebusadatikesiluk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/gusojijozidafokotiw.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_off000059d2.bin
072d3ba46af2329eabb8b7aac8ad318592edc4246bedd0413130c9fda42947cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x59D2 5312 bytes
font_01_sfnt_off00006be2.bin
63dd336fdc72a542b15d544839e9ffe4d3b2bad01b09bf0b8fa53f1283790f31
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE2 10660 bytes