PDF malware analysis — malicious · c99b6894be9c1ac0

MALICIOUS

PDF

37.1 KB Created: 2020-09-02 03:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2064715ba4b495fca3cf31212f86f0cf SHA-1: 967457735750672dd6f524b667303373a3faf4a0 SHA-256: c99b6894be9c1ac015da3beb376aa846d071398ed1d2661b58a56c5891bc9643

154 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.ru, disguised as a car seat user manual. This suggests a phishing or scam attempt to lure users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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=cosatto+car+seat+user+manual
- https://static.usrfiles.com/ugd/c75f60_fbd52b0a7a6c45d28a54a4163accc50d.pdf
- https://static.usrfiles.com/ugd/3f4b99_a33f4c04fd00441f901b3930d96d5a4e.pdf
- https://static.usrfiles.com/ugd/b8c837_b03a392f0c864f339b26f3c3b6d0a86f.pdf
- https://static.usrfiles.com/ugd/787b0a_a90353273e534214945d475f186937da.pdf
- https://static.usrfiles.com/ugd/e33828_5a0d0068343e4ea29a20c5e7e407b424.pdf
- https://static.usrfiles.com/ugd/7ff653_639c19c5580b4c3eb1cbd6f2d6618ab6.pdf
- https://cdn.shopify.com/s/files/1/0433/7860/6229/files/roxasake.pdf
- https://cdn.shopify.com/s/files/1/0428/4183/3635/files/figokekowusujawevegazun.pdf
- https://cdn.shopify.com/s/files/1/0431/0473/1300/files/busiseze.pdf
- https://static.usrfiles.com/ugd/930050_a328b9fb85c7472e9447ddad11017f65.pdf
- https://static.usrfiles.com/ugd/0baf77_f1f06c6fd86446d481ade30243af3550.pdf
- https://static.usrfiles.com/ugd/ca300b_554561a42a334269bc2cdf8245766ace.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_off0000482c.bin` `679119aa55ef6d69f8b20340c04b2b01a22b4ca63b87a95c113ede2b1078fc07`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x482C	4804 bytes
`font_01_sfnt_off00005862.bin` `580444dcd80bcdc4b5382abf061eafd863fe656a3530875ed6635419fa432584`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5862	9764 bytes
`font_02_sfnt_off000079c2.bin` `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79C2	4324 bytes

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