Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e295dca92e1f515…

MALICIOUS

PDF

47.2 KB Created: 2020-08-23 08:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e210f34b2e97be265f750a6256f144ee SHA-1: e011b01414f7747bff77d86e0ea5ec26966aef02 SHA-256: 6e295dca92e1f515b06820c19f0c270b2157594bbfe4cc76480fc3c831b6f6ea
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for distributing malware or leading users to malicious sites. The document body and embedded links suggest a lure to download a modded application, likely to trick users into downloading malware. The ML classifier strongly indicates maliciousness.

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=bombastic+brothers+mod+apk+unlimited+gems
    • http://files.bnkrescue.com/uploads/1/3/2/6/132695620/2933999.pdf
    • http://files.stcharlespilgrimages.com/uploads/1/3/1/4/131406610/9461571.pdf
    • http://dapij.lostintimegraphics.com/uploads/1/3/0/7/130738929/girasikasogamagekun.pdf
    • http://files.wlnhelena.com/uploads/1/3/0/7/130776204/c2c7dde88bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53522836856.pdf
    • https://cdn.shopify.com/s/files/1/0433/3230/5054/files/21743044829.pdf
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/zefaselogak.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/61635072105.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/84366602242.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/58698722806.pdf
    • https://cdn.shopify.com/s/files/1/0429/7654/2873/files/character_sheet_dnd_5e_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/lobivute.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/51828681818.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000625f.bin
12e42849fcb1d6d8139974c84a4012ebd0c37f849c6eff81fe8b0a1c5f271ace
pdf-font-stream PDF embedded font (sfnt) at offset 0x625F 5740 bytes
font_01_sfnt_off000075ad.bin
9e1bfd255683181a0024e9de6b1b81c38f6f4bda58fa96a34c4df31e5bf7ea91
pdf-font-stream PDF embedded font (sfnt) at offset 0x75AD 10644 bytes
font_02_sfnt_off00009a6b.bin
d2619b9a2a7dec81ecbbf05c496b7f5492bc56d5eefc2cd48183daaf603cb6ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6B 16160 bytes