PDF malware analysis — malicious · 7475a2078e7aa6f0

MALICIOUS

PDF

40.1 KB Created: 2020-08-30 10:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: afd601f1be33c3473958b5b8fff7d9e2 SHA-1: 8a276c270afcc32ed9084df8f93fd1316c64b77b SHA-256: 7475a2078e7aa6f03fbc032a54d077293225b08806cee2421371502e54bff1dd

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, one of which, 'https://ttraff.com/wix?keyword=vampire+the+dark+ages', is flagged as a malicious redirector. The document also contains a large number of other PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection scheme.

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.com/wix?keyword=vampire+the+dark+ages
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_ad8ec77c1d674a20b193146279898101.pdf
- https://static.usrfiles.com/ugd/1c8c6c_f214cd970d634ca69ff74da9b6ee250c.pdf
- https://static.usrfiles.com/ugd/b8c837_9e1e337cd6fd4260911a757f1980cbd0.pdf
- https://static.usrfiles.com/ugd/565485_b3fa23b9d0e7422facc952ca50a90785.pdf
- https://static.usrfiles.com/ugd/4cf28d_d6c94a0615204007b6d5630966e288b5.pdf
- https://static.usrfiles.com/ugd/b8c837_7943355ef603443b9928849a2c7c9bdf.pdf
- https://static.usrfiles.com/ugd/b8c837_b89788869c5943fcbffa2295ffcc492d.pdf
- https://static.usrfiles.com/ugd/80c1db_83f17a353e314ade80bca55c5a4c4dde.pdf
- https://static.usrfiles.com/ugd/a4e402_b627e30c9d234c3cbd9673526070449c.pdf
- https://static.usrfiles.com/ugd/b8c837_61b3d792c6924598b05474a1d9757e8c.pdf
- https://cdn.shopify.com/s/files/1/0437/5438/9665/files/59737620918.pdf
- https://cdn.shopify.com/s/files/1/0429/3420/6620/files/20593755688.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005f2c.bin` `c0e9c57c4f180d6887817cafb8359ba7cad0cbb97af83092e7b0d73668d3b4a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F2C	5368 bytes
`font_01_sfnt_off0000714f.bin` `e973b337b19ec644cf8e338c0b08bd3627b61faef211cf6835b049a4cf8ad485`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x714F	10020 bytes

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