Malicious PDF — malware analysis report

Static analysis result for SHA-256 5307e8c10fd8297a…

MALICIOUS

PDF

45.1 KB Created: 2020-08-05 18:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5aab24e86f4c7fe18031773c0b8010a SHA-1: 91c54b37acdae3c4f5afa4a23da553a4523af276 SHA-256: 5307e8c10fd8297ae60484d5ba89c3d3c5fd2d01ee8d30a0f308d0e52776000c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=al+quran+16+lines+tajweedi.+pdf+download'. The ML classifier also strongly indicated maliciousness. The document body text appears to be a lure related to Quranic content, likely to entice clicks on the embedded links.

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=al+quran+16+lines+tajweedi.+pdf+download
    • http://files.3brosdesigns.com/uploads/1/3/2/6/132681513/1508157.pdf
    • http://files.evaarchersmith.com/uploads/1/3/0/8/130874490/pedibibizurup.pdf
    • http://files.animatorssketchclub.com/uploads/1/3/1/4/131453588/nizokekananilu.pdf
    • http://files.larchwoodcounselling.ca/uploads/1/3/1/6/131636746/79c87446.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8909/files/fapezawuronefejosowaxo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/gikuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1592/8997/files/goporokemiwuwiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/65364142008.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1924/files/37597624243.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/deep_ecology_theory.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/repulipevogo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9015/files/direito_penal_parte_especial_cezar_roberto_bitencourt.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/objective_c_constants.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/fewen.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
stream_005_off0000802a.bin
992cde81c252d18ce19f7734aafc46024f7600c2509ac8cc792eb757a1b5ddee
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x802A 22832 bytes
font_00_sfnt_off00004b79.bin
0b8f433d22716e5a7d324fdd379245dd6bda599872bc72a8147836d882da9c7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B79 5556 bytes
font_01_sfnt_off00005e8e.bin
a697b74d6bb9fff6b942d8b906f63a65362125ce864a8cea9e4e99e330dcaa85
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8E 9744 bytes