Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05e61bfbb307505…

MALICIOUS

PDF

37.9 KB Created: 2020-08-15 07:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa4c95dab37bea2b357cea9f54aae9aa SHA-1: 0ec9d5bcb32af6c34878aba54362be6278faefdf SHA-256: d05e61bfbb307505633e58a1080beb456372c05439e8924ca741e203d529bf6e
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, masquerading as a service manual to lure users. The primary malicious URL is https://ttraff.cc/wb?keyword=rockshox%20reba%202013%20service%20manual. The document body is heavily obfuscated but contains references to the lure and the malicious URL. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=rockshox%20reba%202013%20service%20manual
    • http://files.upstatecluttercoach.com/uploads/1/3/0/7/130739593/b5d98f35a2cb00c.pdf
    • http://files.countyparkfriends.org/uploads/1/3/0/8/130814279/zobisulit_selitiga_sojinotavom.pdf
    • http://files.kabetogama-lake.com/uploads/1/3/0/7/130776211/bidisedugu_fusifamigegom_nomazez.pdf
    • http://refuzixu.thesciencelady.co.uk/uploads/1/3/1/6/131606490/9564159.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/41713223923.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/fiverur.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0599/files/favabenigixawapuwebejelar.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/fonunewakexavekew.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/ronasusiboviliz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8382/files/50773629215.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/buwebobigugomaxowobusanif.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/nuzakexigogebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/39896400945.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/59439701177.pdf
    • https://cdn.shopify.com/s/files/1/0440/7971/0360/files/jaripakapiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/panduan_belajar_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/dopepev.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/tomisosix.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2245/files/the_crime_book_big_ideas_simply_explained_download.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_off00005103.bin
82263ae8b81dd2b0a6202e878a6013f1ba956c616f6b6821d4700bcfe21c5889
pdf-font-stream PDF embedded font (sfnt) at offset 0x5103 5868 bytes
font_01_sfnt_off000064db.bin
11d32fc8e3da52c23793803f0115305f09b393b073212ff08b0393e6a72ed10c
pdf-font-stream PDF embedded font (sfnt) at offset 0x64DB 11792 bytes