PDF malware analysis — malicious · 4504f8e6e98920f0

MALICIOUS

PDF

48.8 KB Created: 2020-08-30 17:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fdc34da73216f42029ac59bf32e488a0 SHA-1: bdfd9d8fe4be284f4c1b828a765a92e9288828ac SHA-256: 4504f8e6e98920f07c161e38b3ba9692a456f520c3ca61c6c81a1ff3664b4816

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a mass external PDF link farm, with many links pointing to static.usrfiles.com. The ML classifier also strongly indicated maliciousness. The document body contains text related to a generator manual, likely a lure to disguise the malicious links.

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.com/wix?keyword=pulsar+1200+watt+generator+manual
- https://static.usr
- https://static.usrfiles.com/ugd/b8c837_05e4b21b11414fb683019110d7e4708a.pdf
- https://static.usrfiles.com/ugd/b8c837_b5f0a7616f2c4122a05a0dc4150c0a8c.pdf
- https://static.usrfiles.com/ugd/f523c3_2306fca3b23947749aa658b9b48415f1.pdf
- https://static.usrfiles.com/ugd/b8c837_a6eacc84c547487389b3ed79048008aa.pdf
- https://static.usrfiles.com/ugd/b8c837_9b344450f25b49bf95e1d2fa05b85f01.pdf
- https://static.usrfiles.com/ugd/7e0eb0_98124cccbca147c58485dc4d7dc3a6a6.pdf
- https://static.usrfiles.com/ugd/b8c837_cc77888b63c54c609c48469be275e08c.pdf
- https://cdn.shopify.com/s/files/1/0431/0758/2106/files/76569153464.pdf
- https://cdn.shopify.com/s/files/1/0431/7816/4387/files/zuketawoluvetosol.pdf
- https://static.usrfiles.com/ugd/b8c837_9bcc5f2c98884778aaea515996663cd5.pdf
- https://static.usrfiles.com/ugd/271e65_a144dbfc49cf46238d83453138b247cb.pdf
- https://static.usrfiles.com/ugd/b56239_3d1b541e8df54c459004d612514e0908.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_off0000773c.bin` `abd620885c834fded94f2a7ed2e6c003fd8a15d8e06865f91503f107e9282ecc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x773C	5424 bytes
`font_01_sfnt_off000089a3.bin` `b59aaf2e00b3572ba9abf9dfb8b1e220842f6ea5382cc54f5c85ee663d56de45`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89A3	14776 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.