Malicious PDF — malware analysis report

Static analysis result for SHA-256 184ad5856a2c9dfc…

MALICIOUS

PDF

36.4 KB Created: 2020-08-01 14:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cd3bc8eb9fe0cd33cd396faa1c7efa4 SHA-1: 79483b1cde3a25a5f9628bd72e4c0e9ce5128ed4 SHA-256: 184ad5856a2c9dfc4bded06c1eb7798902053c3fe97407e6c58db94ce1ca9221
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=lowes+abington+ma'. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links suggests an attempt to create a link farm or distribute malicious content through a series of redirects.

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.cc/pify?keyword=lowes+abington+ma
    • http://files.ballardbanjers.com/uploads/1/3/1/6/131636766/2533e5413255d0.pdf
    • http://files.juliamontgomery.com/uploads/1/3/0/9/130969985/nimutegavidis.pdf
    • http://files.elkhornvalleyhrc.com/uploads/1/3/0/7/130775466/f328c8.pdf
    • http://files.ksp-boutique.com/uploads/1/3/1/4/131453288/3415944.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6315/files/62034180448.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/japifosinakozadomuzudig.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/boxet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/tetudevunugumofi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/18896299048.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/lafazufimop.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/57668203577.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/31704993636.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/59311190886.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8215/files/silawasekagep.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005038.bin
242ebce67b7eb8c05b4c73de705df80f2a12261ba09f328df3e707eb1c21ff66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5038 5052 bytes
font_01_sfnt_off00006173.bin
dc4179765c22b8fa50ec578fecabc224e0e2342792794daf1c173301591b6703
pdf-font-stream PDF embedded font (sfnt) at offset 0x6173 10328 bytes