Malicious PDF — malware analysis report

Static analysis result for SHA-256 347b341e47dc7feb…

MALICIOUS

PDF

50.6 KB Created: 2020-08-23 11:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a67e406526de5b11c96e8a9dc1af7ed4 SHA-1: 7fe916d24666c6744849b7edc042f4dacc3b8e3b SHA-256: 347b341e47dc7feb5eec996a3d96b9b17be1017f79b41245c5a62d8c8dfc5de4
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=zelda+ocarina+of+time+wiki+guide'. This link is presented within the document body, disguised as a game guide, to entice users to click. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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=zelda+ocarina+of+time+wiki+guide
    • http://files.divinemercy43.com/uploads/1/3/1/6/131607712/9430604.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/antivirus_anti_spyware_anti_malware_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/5941/9038/files/free_piano_sheet_music_popular_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/juveriza.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/wonodazemubikomelopifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/83458397128.pdf
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/brics_summit_list.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/29842590157.pdf
    • https://cdn.shopify.com/s/files/1/0433/5416/1310/files/2792975935.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/58400876525.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/sistema_renina_angiotensina_aldosterona_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/feginizogaju.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_off0000764e.bin
f833535d9f17b05cede94201865f4a385a2ad8b6e86e95426a860a6881762d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764E 4968 bytes
font_01_sfnt_off000087a5.bin
c2c3fc208c4697415a300dddd6c625954d5d6fc16acb268d421d5fa936d378cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 5276 bytes
font_02_sfnt_off0000999d.bin
1e4cd6bd177ce5f974a5f6c40a0fa4a6b28b45994a0959e97c46977e684ae90a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x999D 10468 bytes

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