PDF malware analysis — malicious · c7169b26acf2601d

MALICIOUS

PDF

38.1 KB Created: 2020-09-09 00:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cae2021721c2a40438fa365d2f9de0b4 SHA-1: f6eb80aa233043d640eea2495a3c584e12dd4350 SHA-256: c7169b26acf2601dc170d6242e8038ea18f0ea14a3545d40fdbdd03adf7f8806

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be a lure to a malicious redirector.

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.me/wix?keyword=statistical+quality+control+mahajan+pdf
- https://cdn.shopify.com/s/files/1/0428/8079/4790/files/96347208988.pdf
- https://cdn.shopify.com/s/files/1/0432/5592/2852/files/bupusawe.pdf
- https://cdn.shopify.com/s/files/1/0430/5109/0071/files/gorunudelexutevetej.pdf
- https://static.usrfiles.com/ugd/d2cc1f_ffe33ccfaa584a3882cb96deef114c1f.pdf
- https://static.usrfiles.com/ugd/debbe1_3e3b280749b846a6bf67a67e3dd2b0dd.pdf
- https://static.usrfiles.com/ugd/54dfea_fa162a2149ab4de89f72a5b5cec9cf4b.pdf
- https://static.usrfiles.com/ugd/5a1791_57e77cb32a8b40beaa2f523984ccd452.pdf
- https://static.usrfiles.com/ugd/238140_02f152bdce6948b09455009240cba3c2.pdf
- https://static.usrfiles.com/ugd/7e0eb0_8c5193fb9a184fc6a340d143eb2277a1.pdf
- https://static.usrfiles.com/ugd/b8c837_0e31703808bf4874b7dd69aadd26b9a4.pdf
- https://static.usrfiles.com/ugd/136d3d_20386f42073b472a8a352c7aa8974df2.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_off00004026.bin` `fc30e282c8504aef3c87727fc7b7cb0d8bc50c244da4c8f243345369f6c371bd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4026	5800 bytes
`font_01_sfnt_off000053c5.bin` `03d4992897a791197b973a80d76043a9427d3e548ac1f6bbb2d3ab458422e00d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x53C5	10028 bytes
`font_02_sfnt_off00007640.bin` `6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7640	16164 bytes

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