Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b972ceb9f0c277d…

MALICIOUS

PDF

177.6 KB Created: 2020-08-02 08:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc8990638cdf9880e806cf0490613338 SHA-1: 4addd197654a54f32bfbd6110edd350db36a2816 SHA-256: 6b972ceb9f0c277de46448bc7ab66aec60423efec782b9ae8a890d4d92c5c98f
134 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be related to the URL's keyword, suggesting a lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the URL, and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=calculate+distance+between+two+points
    • http://files.triadwealthmanagement.net/uploads/1/3/1/0/131070619/b91d9.pdf
    • http://files.avriltahoe.com/uploads/1/3/1/3/131380063/jobiwutaxalofeg.pdf
    • http://files.thehalloweenshopofbenton.com/uploads/1/3/1/3/131383283/2948959.pdf
    • http://files.nataliecdavis.com/uploads/1/3/1/4/131438641/eb201dc9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/wal_mart_stock_splits.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/koluwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/kofuxinuxepetip.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/95841605765.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/fallout_new_vegas_gun_runners.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/rozubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/55968340181.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/xelulolibeketafivujix.pdf
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/bumovisanonamabatenuloja.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/27350267750.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/49753860384.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/2016_ford_explorer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/30816974068.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_off00027431.bin
9e3a20f2a0e84c5202eb88c73c6df13bf52b15f5583a23683db65de3efc472ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x27431 5108 bytes
font_01_sfnt_off000285ab.bin
82e732f4e3192f8d98559028704b878f4421c55974f420875de78e0fadd8d4ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x285AB 16004 bytes