PDF malware analysis — malicious · b87da2af14877efd

MALICIOUS

PDF

36.7 KB Created: 2020-09-02 15:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0e72aad71ad25460fcd3a214b7a7bc16 SHA-1: 55f6e14a00e980dc322c987841102ebeaad107e6 SHA-256: b87da2af14877efd88f93bdefa6cb900a90a71fab7452eb663513595cac5b238

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references to song titles, suggesting a social engineering lure. The presence of numerous other PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, potentially to improve SEO for the malicious redirector.

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.club/wix?keyword=chikni+chameli+song+free++naa+songs
- https://static.usrfiles.com/ugd/34ec99_583aed2ae3ee4042ac570e6b9e8dd2be.pdf
- https://static.usrfiles.com/ugd/451a43_f6f6be0bae61419a9b58671c1be97ad1.pdf
- https://static.usrfiles.com/ugd/234f58_ae7a1e65165347c88a92e7ae66a4754b.pdf
- https://static.usrfiles.com/ugd/48f461_27da3cc6634a4938a6fdf903e324e890.pdf
- https://static.usrfiles.com/ugd/87b9a8_b7b9b710d4004a54802743ec670b90a7.pdf
- https://cdn.shopify.com/s/files/1/0429/1490/6275/files/65706746221.pdf
- https://static.usrfiles.com/ugd/ab059d_7590e86a94dd4ffbb08cff373a0cdf05.pdf
- https://static.usrfiles.com/ugd/b8c837_a21f28d8f01041dbaa3e5affb1b8db98.pdf
- https://static.usrfiles.com/ugd/a4e402_03fb34ce2fd84a4ea92e53d0db7949d0.pdf
- https://static.usrfiles.com/ugd/b6edda_e2486c428e0b4f95975ec4c4294eccee.pdf
- https://static.usrfiles.com/ugd/b8c837_8674ca55ab884b7881aba10e2e0f5705.pdf
- https://static.usrfiles.com/ugd/b8c837_f2a7f909c2aa42d596bc83264ff99d4c.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_off0000489d.bin` `d4824b4e3b5d0d9a3999f2cd7d813669ed5737588a8a4c21117cd51429ea90cc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x489D	5264 bytes
`font_01_sfnt_off00005a55.bin` `9e6af5484119569324b7d31647842fd8a23423ec27cd1972a90ed82077f0058a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A55	13184 bytes

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