Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fc9e60aee171e7…

MALICIOUS

PDF

56.8 KB Created: 2020-09-02 02:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2bbf1298726d27b9006d8c0eef4a000 SHA-1: 4e982e2f54ddbd1bdd1c5ee667d61b406dbc3466 SHA-256: a9fc9e60aee171e77784b90e9bfca3dc66cb12c9ec59d5115e6f63e86e4f1343
158 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=kaka+bhaniawala+all+songs, which is flagged as malicious. The presence of many external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/wix?keyword=kaka+bhaniawala+all+songs
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/achy_breaky_heart_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/67280279732.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/rumurapa.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9c578f1fca946be8a8148f259330973.pdf
    • https://static.usrfiles.com/ugd/9757e7_c53f5c33ad894877a7fab1253e379b73.pdf
    • https://static.usrfiles.com/ugd/80685d_fd92a042ccf443f0b5d3fd8d907501ac.pdf
    • https://static.usrfiles.com/ugd/37987b_1431afce94f94f7e8921d411341e7e82.pdf
    • https://static.usrfiles.com/ugd/f8de3e_88d0057705814c99977ad6261600eee6.pdf
    • https://cdn.shopify.com/s/files/1/0441/1555/8552/files/39227956928.pdf
    • https://cdn.shopify.com/s/files/1/0458/1693/8662/files/diwinuxizuduwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/24_season_1_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/1208/8231/files/27711135518.pdf
    • https://cdn.shopify.com/s/files/1/0430/4388/1114/files/tunabixadotelikixoviwuko.pdf
    • https://cdn.shopify.com/s/files/1/0435/9458/0136/files/the_fundamentals_of_drawing_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/packet_tracer_7._3._2._4.pdf
    • https://cdn.shopify.com/s/files/1/0465/0221/5838/files/27527469779.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/bag_s_groove.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007145.bin
accb0e8e08df7df441fc0cf801b75e0611589874be1ee6ff0127fbe32b92744b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7145 5116 bytes
font_01_sfnt_off000082c2.bin
59a311558028f6bffddedaa808d2f59aa70f50a47c0128e4211eb0f1acfea403		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C2 3448 bytes
font_02_sfnt_off000090c2.bin
50e5d8b721a8b57ba1081fe1e2124139a5cf800a9aba35c7b34153bbf3f97aec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90C2 15320 bytes
font_03_sfnt_off0000c048.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC048 16204 bytes

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