PDF malware analysis — malicious · 57f36c751cee0a1e

MALICIOUS

PDF

42.9 KB Created: 2020-09-05 15:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c7d1cb07f0057933a4e02e96d0dd068d SHA-1: 7223b69392662c70437d43788170734fa2cf381c SHA-256: 57f36c751cee0a1eb760c28f25b9d410325b1f39862324bbd59233b956d1bef4

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a direct link to a redirector disguised as a free movie poster template download. The primary malicious URL is https://ttraff.club/wix?keyword=movie+poster+design+templates+free, which is likely used to deliver a secondary payload. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports a malicious intent.

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=movie+poster+design+templates+free
- https://cdn.shopify.com/s/files/1/0436/8026/8438/files/6610980643.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
- https://cdn.shopify.com/s/files/1/0441/3263/0680/files/jizerupidide.pdf
- https://static.usrfiles.com/ugd/15cd4d_f6848b92c9e844f2ba9938fa81b6ec54.pdf
- https://static.usrfiles.com/ugd/b8c837_5bce72a7ffd14caa9d8db5abc9e0092a.pdf
- https://cdn.shopify.com/s/files/1/0433/6759/6184/files/wivabik.pdf
- https://cdn.shopify.com/s/files/1/0434/6455/6710/files/seleganalomagewavo.pdf
- https://static.usrfiles.com/ugd/fedf23_7847874b178c428bb07e3b3f824dc94a.pdf
- https://static.usrfiles.com/ugd/57c819_db69ce8a2b1c43d5a38db16963376185.pdf
- https://static.usrfiles.com/ugd/e4ff69_a38309ede4c747b8a4afe5dcc19a5918.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_off00005f65.bin` `66e24db15abef74b3e8cb0075dd9f837f70220828c5824f8f7d10c659f651875`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F65	5428 bytes
`font_01_sfnt_off000071cf.bin` `72a3fe65f0a21df30f240897224061cfa351088b80a4eb601fb5defb198ec993`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71CF	2268 bytes
`font_02_sfnt_off00007be1.bin` `7c645ba0c67fb59883e80403993708e6896e9b52b64e5c4031f130e60b4516cd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7BE1	10188 bytes

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