Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d50436c43a701e1…

MALICIOUS

PDF

49.3 KB Created: 2020-08-19 23:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bfa8da26a3a06bf3025af4fdbcf7c30 SHA-1: 2edb57f1982840d1dac2589f6eafdeb37ba77591 SHA-256: 2d50436c43a701e146190173619dd1b649af4d9936e6405e07f7ee9a82686227
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=bottlers+nepal+limited+annual+report'. This indicates the document's primary purpose is to redirect users to malicious sites. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering lure.

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/pify?keyword=bottlers+nepal+limited+annual+report
    • http://files.missoulaclimate.org/uploads/1/3/1/0/131069968/dd284475c02.pdf
    • http://files.the-therapy-centre.com/uploads/1/3/0/7/130739060/birubuwururabila.pdf
    • https://cdn.shopify.com/s/files/1/0435/2308/0344/files/56861247302.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/ark_mod_731604991.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/spotify_premium_apk_iphone_5.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7020/files/kofezisa.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/wuxujanipulur.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/rugelurulusudefonepana.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/ethiopian_reporter_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/51355123761.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/ponoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/automotive_can_bus_system.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/gejojonusivafiredexo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2695/files/60617023127.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007680.bin
5ff126f4c07398f4d83034456e31343a45d76a2d7cb68fa053de752fdf072f44
pdf-font-stream PDF embedded font (sfnt) at offset 0x7680 5036 bytes
font_01_sfnt_off0000877c.bin
fcd2223752c4ab54efac3207e0e0ccb539ef337b1f81e0544ba830fdb5a178d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x877C 10088 bytes
font_02_sfnt_off0000aa0b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA0B 4324 bytes