PDF malware analysis — malicious · cf6e1a92fb65bd2f

MALICIOUS

PDF

51.1 KB Created: 2020-08-22 00:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 05cc1e0cef289bbb00959a50588ba75f SHA-1: 4f2f9fdca16b9179dd1cba7ae410e6e1efddbb6c SHA-256: cf6e1a92fb65bd2f141939e3a0dc2c9b8191082fe40683d514e8fb9f81528814

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a search result for sheet music. The link directs to 'ttraff.cc', a known malicious redirector. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

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=beethoven+piano+sonata+no+15+sheet+music
- http://nafif.gstars.com/uploads/1/3/1/6/131606140/jubibumuj_sonebojumewigof_kibagozir_redunujofilix.pdf
- http://files.delusionandco.com/uploads/1/3/1/3/131384333/597765.pdf
- https://cdn.shopify.com/s/files/1/0431/8052/3681/files/55557716914.pdf
- https://cdn.shopify.com/s/files/1/0431/9887/3763/files/ranopixotisixetawuzi.pdf
- https://cdn.shopify.com/s/files/1/0428/2790/7239/files/12546143804.pdf
- https://cdn.shopify.com/s/files/1/0463/2533/4171/files/properties_of_addition_worksheet_grade_3.pdf
- https://cdn.shopify.com/s/files/1/0429/5272/0543/files/dalos.pdf
- https://cdn.shopify.com/s/files/1/0440/8170/9206/files/19968779519.pdf
- https://cdn.shopify.com/s/files/1/0431/3071/6322/files/4108020304.pdf
- https://cdn.shopify.com/s/files/1/0428/4622/4551/files/29612017264.pdf
- https://cdn.shopify.com/s/files/1/0430/2379/4339/files/lolinufodimamabilusadufo.pdf
- https://cdn.shopify.com/s/files/1/0438/4030/7362/files/buvojosudukuwolejiloz.pdf
- https://cdn.shopify.com/s/files/1/0433/7896/6686/files/ain_t_no_grave_bethel_chords.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/
- https://cdn.shopify.com/s/files/1/0428/2790/7239/files/12546143

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005d9e.bin` `47e2baa6f7e99f0fa8d4cc22b305199696d5468b667f175c7bd2d51f348c3d83`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D9E	5212 bytes
`font_01_sfnt_off00006f3a.bin` `bf034e4ce365b0e2ef49867cb9c26fbfe93a79e27ae60d93b9aa5d28c65083b6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F3A	14332 bytes
`font_02_sfnt_off00009bf2.bin` `58ab0355b12e7deceedda9b43bc31de04a7630cd803884eb04189384e4c03267`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9BF2	16076 bytes
`font_03_sfnt_off0000b094.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB094	4324 bytes

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