Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a3c5810634fcc5…

MALICIOUS

PDF

70.7 KB Created: 2020-08-13 04:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3101e61c08d91c51f65d2078e20ee04 SHA-1: 14430f63a5966ba89b24da4359f2c3f739184175 SHA-256: 41a3c5810634fcc58edb01b1a295f9bc214e1c5fed168e3bcddf381fcf67be88
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs confirms the intent to redirect users to potentially harmful content.

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=100+most+common+idioms+pdf
    • http://wemovulez.staghornridge.com/uploads/1/3/0/9/130969723/tovabezapifula.pdf
    • http://files.skysthelimitsanctuary.org/uploads/1/3/2/6/132680926/366a5.pdf
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdf
    • http://files.hallvardlillehammer.com/uploads/1/3/2/7/132741176/4591916.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/74152395571.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/7036355012.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonamov.pdf
    • https://cdn.shopify.com/s/files/1/0443/3425/2188/files/6950471408.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6961/files/vukubasazevefu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/setonulajup.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/3950761333.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/knowing_god_better.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/lexalododatew.pdf
    • https://cdn.shopify.com/s/files/1/0449/7784/8488/files/google_docs_export_to_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0428/1224/4134/files/musotevaraxibetulidonino.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/29440919149.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_off0000d9d7.bin
34368db476bfba90651a62c4cf182f5880bbc5740f7ab27d4b7ffd7be43d2114
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D7 5060 bytes
font_01_sfnt_off0000eafb.bin
f8e6242a37230b1f194002c46d47e0b2e37b37b134cb9675834d29965a369f64
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 10192 bytes