Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4b88fdfea58646…

MALICIOUS

PDF

59.7 KB Created: 2020-07-31 12:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1628cb2d77a130526645e422f4668ed0 SHA-1: b8884756204b0609fddc75d3ae0ed58301df3679 SHA-256: 2f4b88fdfea58646949083af87a295dece1acbf10ad0f0135908de4bc90dbc72
152 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 pointing to 'ttraff.cc'. This URL is likely used to funnel victims to a phishing or malware site. The document body, though heavily obfuscated, contains text related to 'Alprazolam', suggesting a potential lure for illicit pharmaceuticals. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, possibly to improve SEO for malicious content or to distribute payloads.

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=alprazolam+bula+pdf
    • http://files.larrylilly.net/uploads/1/3/0/8/130873908/4768891.pdf
    • http://files.eastafricanscholarsfund.org/uploads/1/3/0/7/130776718/vemofuva.pdf
    • http://files.sinnovatek.com/uploads/1/3/1/4/131405948/kusid_towemimuwivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6844/files/90898240171.pdf
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/9907827168.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/fofitodakonadamaxel.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/xisinaxanat.pdf
    • https://cdn.shopify.com/s/files/1/0441/2620/8152/files/xujatoloroxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/49445338715.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/wekabiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/75386999411.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/xalumufumatosim.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/93847602340.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/xasawitaburinilurapik.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/48245367282.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_off0000ad77.bin
c919a3e5c953dd215aba75258a82601cb70440a2c4c676c2f9f529a6c1d68942
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD77 4720 bytes
font_01_sfnt_off0000bd71.bin
5b5d03130884c1256c8a143788042f78fd60548d137de7edebfbe4fd4ae3ad86
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD71 10980 bytes