PDF malware analysis — malicious · 1c96718730e5dc20

MALICIOUS

PDF

40.3 KB Created: 2020-09-06 22:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d819f2922ac2d67e0f8c18422b2f4fa4 SHA-1: e8d3cb5f6aa89caceac993a96359e6a25559498e SHA-256: 1c96718730e5dc20240a8397073c159841988e519a0cc3ff1e4223a82c655409

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to what appears to be a link farm hosted on Shopify. One prominent link redirects to 'ttraff.club', which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that appears to be the primary lure.

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=captive+prince+volume+1+pdf
- https://cdn.shopify.com/s/files/1/0431/7901/6360/files/pezegofenak.pdf
- https://cdn.shopify.com/s/files/1/0431/5214/6587/files/99917075146.pdf
- https://cdn.shopify.com/s/files/1/0431/3802/3592/files/92833631544.pdf
- https://static.usrfiles.com/ugd/3f0e57_d2b37bac87264388a6781bf937786cbd.pdf
- https://static.usrfiles.com/ugd/79e5df_110b79f50989424a9f532c260907bc2c.pdf
- https://static.usrfiles.com/ugd/b8c837_a9006dcd00db4a1ba164894ddcfa0059.pdf
- https://static.usrfiles.com/ugd/4725f1_5d3ac6729e5743829d6ad13e8d4a4fbf.pdf
- https://cdn.shopify.com/s/files/1/0434/1773/1229/files/97228842129.pdf
- https://cdn.shopify.com/s/files/1/0432/3406/6600/files/nutufazinemuxozadukufa.pdf
- https://cdn.shopify.com/s/files/1/0461/9534/3510/files/jofawuvarijedi.pdf
- https://cdn.shopify.com/s/files/1/0459/9385/3087/files/22115614198.pdf
- https://cdn.shopify.com/s/files/1/0434/0085/5706/files/19387498123.pdf
- https://cdn.shopify.com/s/files/1/0431/2514/5760/files/15564737231.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_off0000602f.bin` `6db047508117011471aa5ddc1a55790c0c006540ab0f960fce7db0a6f04ba2ff`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x602F	5140 bytes
`font_01_sfnt_off0000719f.bin` `c5645269beee20bae5d32a23869b79cfec6eb8b1a8d5d59001d8e00969cee31a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x719F	10208 bytes

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