Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e429bbe0ab4d47d…

MALICIOUS

PDF

39.8 KB Created: 2020-08-21 11:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df88d0982fed559f74c6ffba95032cde SHA-1: 5d8341d080dd16a7df38a25f7c6b42cdd3660f7a SHA-256: 3e429bbe0ab4d47de6ffcbee678d19bfcb5f131c5e2241c168cc450c11238220
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for distributing malware or leading users to phishing sites. The document body, though heavily obfuscated, contains text related to 'Mehendi design video free' and the malicious redirector URL, suggesting a lure. The presence of numerous external PDF links also indicates a link farm, likely for SEO poisoning or traffic generation to malicious sites.

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=mehendi+design+video+free
    • http://files.handtohealth.com/uploads/1/3/1/3/131383892/loxatuvefatimufuti.pdf
    • http://pevajez.waltonmanorinn.com/uploads/1/3/2/8/132814718/4cf35dbf6aea.pdf
    • http://bipixipa.mcclainscustomsilks.com/uploads/1/3/1/8/131856158/vakazapovetewefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/nevuvimunejopijafazafizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/ap_calculus_limits_review.pdf
    • https://cdn.shopify.com/s/files/1/0430/3277/2757/files/93796945996.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3298/files/75258261265.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7639/files/setewirologibazixira.pdf
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/pc_financial_mastercard_login.pdf
    • https://cdn.shopify.com/s/files/1/0428/3554/2182/files/punctuation_takes_a_vacation.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/winijopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4899/files/pibuvuvenazuja.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_off0000600c.bin
c30b99d1bcf0ff1a82f4f596591f29e2b820d1f3b31f93e9dd6a0ee6960ed109
pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 4992 bytes
font_01_sfnt_off00007110.bin
ffa4a326585fac8e91757142e29576d387763abd61a35eb2f2bace224b211442
pdf-font-stream PDF embedded font (sfnt) at offset 0x7110 9904 bytes