PDF malware analysis — malicious · aa3505ca7c34824d

MALICIOUS

PDF

32.9 KB Created: 2020-08-30 14:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dfc197c78197f4a07592be630c4913fd SHA-1: 5b7e659d52d9d668b3377e9bc4d87f2aafdd1ac6 SHA-256: aa3505ca7c34824d3b57b54094cbba4ebf09dbf66581b34f993a75a36b7a0786

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a large number of external links, characteristic of a link farm. The embedded URL 'https://ttraff.ru/wix?keyword=danelectro+french+toast' is the primary indicator of malicious intent, likely serving as a lure or a redirector to a phishing or malware distribution site. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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/wix?keyword=danelectro+french+toast
- https://static.usrfiles.com/ugd/b8c837_91b65c4aed5c49e0b53f8eb71402cae4.pdf
- https://static.usrfiles.com/ugd/b8c837_da5cbadefd1b449c8b1031826a4d9e80.pdf
- https://static.usrfiles.com/ugd/b8c837_5cb0cda1480f47419fa40babc8d9a77b.pdf
- https://cdn.shopify.com/s/files/1/0437/7057/7045/files/gidekunof.pdf
- https://cdn.shopify.com/s/files/1/0432/7846/7222/files/91692249544.pdf
- https://static.usrfiles.com/ugd/dfb5f8_f9a4d82f97df47b98b6558ffce61cf12.pdf
- https://static.usrfiles.com/ugd/07625c_b88c723acdbe4f10b488043727a12d4e.pdf
- https://static.usrfiles.com/ugd/b8c837_0c10aad2fbc846258c93f6f9b85cf4f6.pdf
- https://cdn.shopify.com/s/files/1/0434/1419/2284/files/zifasenakosemuwukaroju.pdf
- https://cdn.shopify.com/s/files/1/0430/9581/8397/files/najabodagobakovu.pdf
- https://cdn.shopify.com/s/files/1/0431/6889/1040/files/22234578507.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_off00004605.bin` `9d06d99fbcebe94ff10816b861ac0913f07830aa7a2599f1bfbe2c0a41a03261`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4605	4968 bytes
`font_01_sfnt_off000056dd.bin` `929f51933e3eb4b5a82243902bd5b6424261df628de15fa72461507c5246a13f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x56DD	9532 bytes

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