PDF malware analysis — malicious · 222e0c1c7caef94b

MALICIOUS

PDF

50.6 KB Created: 2020-09-14 20:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 03db51e12ce70f0597f4a4911603cf9b SHA-1: 79c4d88f745e498d5aefe89e29c3a2a8f03589b1 SHA-256: 222e0c1c7caef94b4edcb1efeaa90dfca205fe65b96af790eb9dad14e62193ca

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/wb?keyword=the%20real%20life%20mba%20jack%20welch%20pdf%20free%20download`. This URL is presented as a download for a business-related PDF, indicating a social engineering lure. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to mask the malicious redirector. 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.ru/wb?keyword=the%20real%20life%20mba%20jack%20welch%20pdf%20free%20download
- http://files.rice-military.org/uploads/1/3/2/7/132712080/kolasaralejilividoto.pdf
- http://jafemot.latextsavings.com/uploads/1/3/1/4/131407089/07c4575f59cd.pdf
- https://cdn.shopify.com/s/files/1/0432/1945/2063/files/insect_attractants_and_repellents.pdf
- https://cdn.shopify.com/s/files/1/0433/3063/3881/files/ultimate_candida_diet_program.pdf
- https://cdn.shopify.com/s/files/1/0438/4958/0704/files/garebomawowujobedamajega.pdf
- https://cdn.shopify.com/s/files/1/0438/2910/0701/files/adhyarathri_movie_songs.pdf
- https://cdn.shopify.com/s/files/1/0437/7837/5831/files/guitar_chords_book_download.pdf
- https://static.usrfiles.com/ugd/b8c837_aea42510b00b4a3dbadee64d088213eb.pdf
- https://static.usrfiles.com/ugd/eb5a6a_36ed9f55901e4cdbaf2cd20c29b8a2d4.pdf
- https://static.usrfiles.com/ugd/4aae87_acf93b1709c947799a00d55d2afd12ca.pdf
- https://static.usrfiles.com/ugd/4d400c_754a9e20f1314e43b6c2cb8df9301bf1.pdf
- https://static.usrfiles.com/ugd/5360f8_d80ef79a905a44e88199dbc2c4ad8133.pdf
- https://static.usrfiles.com/ugd/c8a981_ffa9347f5cb34a029376c30f84b02709.pdf
- https://static.usrfiles.com/ugd/b8c837_cc77888b63c54c609c48469be275e08c.pdf
- https://static.usrfiles.com/ugd/121e37_e6f3a3e608ba4f2a9f225a75a0f6e957.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00008630.bin` `bac2391344429580c1e153dae0775c8b62cfca078da3526abdb728cbab8e0fd7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8630	5536 bytes
`font_01_sfnt_off000098e9.bin` `b29490aaa225e53f2ffe82e21c8b4478b7b2419aeddb5567aa8dabdcc72aaff2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98E9	10592 bytes

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