PDF malware analysis — malicious · 2f07643aeda5ab65

MALICIOUS

PDF

37.2 KB Created: 2020-08-30 03:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c5dee8cb458428cffa9cb49ea7ebc9fd SHA-1: ea85def7d3486cc00a444635b0b7b7f02f546d96 SHA-256: 2f07643aeda5ab654234601c38c58e40de373400af88b7b559c48d3ee325f5c9

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to a book title and the redirector URL also includes a book title as a keyword, suggesting a lure. The ML classifier strongly flagged this PDF as malicious.

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.cc/wix?keyword=a+thousand+pieces+of+you+read+online
- https://static.usrfiles.com/ugd/b58d21_478386f854e84efb8de5178b147e4675.pdf
- https://static.usrfiles.com/ugd/b8c837_8731ca8a8b6c45afb1c21e8d644fb998.pdf
- https://static.usrfiles.com/ugd/b8c837_34146b85622e46a5aed24239f8c9cece.pdf
- https://cdn.shopify.com/s/files/1/0434/2035/2677/files/36767838006.pdf
- https://cdn.shopify.com/s/files/1/0433/9453/1493/files/foxiv.pdf
- https://cdn.shopify.com/s/files/1/0432/1814/1347/files/pifiviwazawuwetadivofe.pdf
- https://cdn.shopify.com/s/files/1/0437/7188/7767/files/farming_simulator_2017_starting_guide.pdf
- https://cdn.shopify.com/s/files/1/0440/7951/3752/files/toxuwig.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdf
- https://cdn.shopify.com/s/files/1/0434/2641/4749/files/77721092868.pdf
- https://cdn.shopify.com/s/files/1/0430/5823/3493/files/mipokirajufupi.pdf
- https://static.usrfiles.com/ugd/b8c837_3cba53c8fb9c404482634ad67dad745b.pdf
- https://static.usrfiles.com/ugd/b8c837_1aebf2644115421aa3651062f9b44d5f.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_off00005545.bin` `ccace895011bcf7f659c607ca8df71c73a090e52a11b46d118f9cf4ae43d7fc3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5545	5336 bytes
`font_01_sfnt_off00006766.bin` `7318e7bac4ae5f6eb2632a3321fa41e3b79936034762d5b89bf416a989859bf5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6766	9564 bytes

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