PDF malware analysis — malicious · 2cfdc063782ee3bc

MALICIOUS

PDF

114.0 KB Created: 2020-08-30 21:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 96d6834fd349f798458c08de32c93fca SHA-1: 81a58c945c376808263a46eebfc19777f9c3b384 SHA-256: 2cfdc063782ee3bce6535a428ef9deb43cd174b29ffe1b6264916b0efbdace6c

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to a URL with a sexually explicit keyword. It also contains a large number of embedded links, many of which point to benign Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to funnel users to adult content or further malicious sites.

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/wix?keyword=attack+on+titan+mikasa+nude
- https://cdn.shopify.com/s/files/1/0436/5425/0654/files/tarubarorelozabesu.pdf
- https://cdn.shopify.com/s/files/1/0428/7240/6179/files/76914834932.pdf
- https://cdn.shopify.com/s/files/1/0430/9647/3749/files/mega_link_generator.pdf
- https://cdn.shopify.com/s/files/1/0435/5109/6984/files/70316302215.pdf
- https://cdn.shopify.com/s/files/1/0435/2180/2404/files/sinus.pdf
- https://cdn.shopify.com/s/files/1/0437/6874/2040/files/63454233274.pdf
- https://cdn.shopify.com/s/files/1/0436/0667/1517/files/pajapaluf.pdf
- https://cdn.shopify.com/s/files/1/0431/4244/7261/files/94426277416.pdf
- https://cdn.shopify.com/s/files/1/0452/2383/7856/files/school_vocabulary_flashcards.pdf
- https://cdn.shopify.com/s/files/1/0434/6091/9446/files/nuzaz.pdf
- https://static.usrfiles.com/ugd/c0fca2_5cf9545371c74736bfa71e65a0619c70.pdf
- https://static.usrfiles.com/ugd/ea78e0_d91af08ab8b94a2f936e6b6c9885781a.pdf
- https://static.usrfiles.com/ugd/b8c837_b100a3be4a034c869ea71974aaa80930.pdf
- https://static.usrfiles.com/ugd/e1d12c_7a232e766ac6428bb0f33f8e2d34ed7f.pdf
- https://static.usrfiles.com/ugd/c63dba_264c4b3e7aec42a7b922d0f1873b8d1f.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_off00017806.bin` `2cfd5530d6cea0fe65dd2bc408886bd3ccca61511a1ec8800a7222913d67d0a6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17806	3768 bytes
`font_01_sfnt_off00018579.bin` `8014abd1ae2da7fd87ff66d805a79ba03ab9762440a5b4a03fc936953879f202`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18579	5012 bytes
`font_02_sfnt_off0001966a.bin` `c93ab179955fe776aa29cb6814cb0505ae849924fcb6eabea06f790dbafba503`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1966A	10440 bytes

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