Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced91381e006f72d…

MALICIOUS

PDF

34.2 KB Created: 2020-08-25 09:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0488f7701d5f1327839becc460389189 SHA-1: 914ccaad7d851529615d34f39b3126d89c25bcc9 SHA-256: ced91381e006f72d40a5185055c47dbf127cfbbd580c9acfc8a78894c673bc6f
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a worksheet and includes the malicious URL. The primary attack vector appears to be tricking the user into clicking the malicious link, which leads to the ttraff.cc redirector.

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=adverbial+prepositional+phrase+worksheet
    • http://files.avotova.net/uploads/1/3/1/3/131383825/xiripesep.pdf
    • http://files.blacksprucestudio.com/uploads/1/3/2/6/132695306/vidikir-wezonep.pdf
    • https://cdn.shopify.com/s/files/1/0432/0893/3540/files/boss_telugu_movie_hd_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/gewipaluxaleregezebo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/allow_discord_to_use_mic.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/duracell_auto_battery_fitment_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70277109097.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/74381694480.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48880371243.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/suwuvilegovuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/80798724313.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/understanding_computers_today_and_tomorrow_free.pdf
    • https://cdn.shopify.com/s/files/1/0463/1756/8157/files/missouri_river_fishing_report_below_hauser.pdf
    • https://cdn.shopify.com/s/files/1/0437/6644/8279/files/flight_simulator_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/xasunebe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/71067017865.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_off00004878.bin
e970fd2e1815e14cc5775d1778b0df2bf922d1618cad754ae00b3e37268d37e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4878 5392 bytes
font_01_sfnt_off00005ad0.bin
18d75ff2d58e272ba3471f2a2dc3d2f5c0f4cb75783f7ce3666ea7a5abafe332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD0 9556 bytes

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