PDF malware analysis — malicious · 4734276df82a1869

MALICIOUS

PDF

135.6 KB Created: 2020-08-30 08:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 24b1c7ab30c3947bb5117d9e601d7dea SHA-1: 5f838bf7b0dc31829f4116ec460b36c9840fec49 SHA-256: 4734276df82a18695160cf711edee4ddf76436233a2020d36b14c8d97a338096

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=movie+dr+strange'. This URL is embedded within the document body, suggesting a social engineering lure related to the movie 'Dr. Strange' to entice clicks. The ML classifier strongly indicates maliciousness, and the presence of numerous external links, while many are benign, indicates a link farm strategy.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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+dr+strange
- https://cdn.shopify.com/s/files/1/0433/9492/4694/files/43108756556.pdf
- https://cdn.shopify.com/s/files/1/0437/6104/1559/files/low_carbon_steel_chemical_composition.pdf
- https://cdn.shopify.com/s/files/1/0437/6992/1688/files/tebulutimopipinijinalib.pdf
- https://static.usrfiles.com/ugd/0adedf_a0f51cbb19ce4a6686f6877311fa3f01.pdf
- https://static.usrfiles.com/ugd/271e65_15ca8d2bc3114e7897b2847ddfea55d7.pdf
- https://static.usrfiles.com/ugd/b8c837_c687637e74f74d27a788dbd22bed4b5b.pdf
- https://static.usrfiles.com/ugd/b8c837_e3b43b291c5e40c28f94e13b21089103.pdf
- https://static.usrfiles.com/ugd/e1d12c_35a9f025084a45f8931cede9944f99d2.pdf
- https://static.usrfiles.com/ugd/b8c837_ed426657fc0c469bba22da7019b26597.pdf
- https://static.usrfiles.com/ugd/4dd980_bea23464112d406d8f888ec689fe2f63.pdf
- https://static.usrfiles.com/ugd/b8c837_0e7d1d0853c747a1ad25edcac3ef4490.pdf
- https://static.usrfiles.com/ugd/b8c837_9c5f60f4ae5f4bd284098d999c42e049.pdf
- https://static.usrfiles.com/ugd/b8c837_a21f28d8f01041dbaa3e5affb1b8db98.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_off0001d94c.bin` `b4c686477d62a3b6778ee9e079225d3d88ccde43ef65bf96e4a4f2e76f207a69`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D94C	5028 bytes
`font_01_sfnt_off0001ea84.bin` `41e962c6ab80473e31f47c70936dbd40ab93ca02691cfa5c2e0a3e057398dc00`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1EA84	11464 bytes

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