PDF malware analysis — malicious · bfc7061598f48b01

MALICIOUS

PDF

54.5 KB Created: 2020-07-31 05:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a2270090dc907c7cda8dc63417d5b7c1 SHA-1: 8b17a6a083bf55c0df653a98fbe2cd6ab7553d08 SHA-256: bfc7061598f48b0128b5f21603ed8c28af13af8d82f1fc5d72b6b451276c9623

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'probability aptitude questions and answers pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=probability+aptitude+questions+and+answers+pdf
- http://files.gatewayoflight.com/uploads/1/3/0/7/130739542/verakarexa_nagojubiro_pimivoso.pdf
- http://files.seaspiritstudios.com/uploads/1/3/1/0/131071082/442ed4344e3ba.pdf
- http://files.jaymelea.com/uploads/1/3/1/4/131437984/4314514.pdf
- http://files.soulsearcherskernow.com/uploads/1/3/1/0/131070912/6157150.pdf
- http://files.alterationstotnes.com/uploads/1/3/1/8/131856285/palozesujeluram_tadezewup.pdf
- http://files.alterationstotnes.com/upload
- https://cdn.shopify.com/s/files/1/0429/4826/4089/files/zinajoresiri.pdf
- https://cdn.shopify.com/s/files/1/0431/3579/5354/files/bulinebefawadu.pdf
- https://cdn.shopify.com/s/files/1/0433/7103/6835/files/jexotu.pdf
- https://cdn.shopify.com/s/files/1/0428/2885/7503/files/moxopukivar.pdf
- https://cdn.shopify.com/s/files/1/0434/8110/4541/files/zezubobekofexomekabazus.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
- https://cdn.shopify.com/s/files/1/0435/1868/9434/files/sozoxureki.pdf
- https://cdn.shopify.com/s/files/1/0431/2816/0420/files/turisupapotafezugozuwiru.pdf
- https://cdn.shopify.com/s/files/1/0429/6382/8895/files/57299245406.pdf
- https://cdn.shopify.com/s/files/1/0428/0408/4899/files/kuvub.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00007f36.bin` `7700f55302848dcf142bca22c24e8c16daad476b83e2d99b2489d8de847977e6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F36	5380 bytes
`font_01_sfnt_off00009192.bin` `c1ce0909915a191da2f009c6e7bf8bc1758d1f2c3caf4e8426bea28080d4444b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9192	11064 bytes
`font_02_sfnt_off0000b79b.bin` `ccd0ea095085b9379100d4de0d13d045157d8501f46cd3db2ef5c00475687e02`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB79B	16088 bytes

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