PDF malware analysis — malicious · 560d484b8a52b126

MALICIOUS

PDF

45.3 KB Created: 2020-09-10 06:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 391b2730632ff28044c5b664aa57213f SHA-1: 360fbc8b61b846c860794e8a5e9ea0d0637f1eba SHA-256: 560d484b8a52b1260ccc2812a8282516af247c976f15dfee9584ec53c1df0067

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it's a redirector link to a URL associated with potentially malicious activity. Additionally, another critical heuristic identified it as a PDF link farm, with numerous external PDF links, some of which point to suspicious domains. The document body contains text related to 'Borderlands 2 commando skill tree guide' and a URL, suggesting a lure to entice users to click on 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.me/wix?keyword=borderlands+2+commando+skill+tree+guide
- http://jasotibu.steveblanchardmusic.com/uploads/1/3/2/8/132814097/c905e700.pdf
- http://files.davisdeckandfence.com/uploads/1/3/0/7/130739475/4155213.pdf
- http://jexodo.craigformissouri.com/uploads/1/3/0/8/130873982/962035.pdf
- https://static.usrfiles.com/ugd/a8cc01_d1cd43da938e41278f755f095053ae43.pdf
- https://static.usrfiles.com/ugd/185811_0764b4dd59394fd49270ff0476f8f302.pdf
- https://cdn.shopify.com/s/files/1/0463/7822/1729/files/bjoms_case_report.pdf
- https://cdn.shopify.com/s/files/1/0434/3644/1767/files/vidmate_app_install_old.pdf
- https://static.usrfiles.com/ugd/2f7815_0189d5770a54403ab778654204d7be70.pdf
- https://static.usrfiles.com/ugd/ab0441_3de0ff1b418a456896b43811314fba29.pdf
- https://static.usrfiles.com/ugd/96564c_9eb1451009fe4047b43acc1e28fef090.pdf
- https://static.usrfiles.com/ugd/76de1a_557590d02647498784c22d1ab97f663e.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_off00007116.bin` `e3d1f5657f53d03fe49e293bf3bde4cb2b0d526578afc6aec83e61902911d4c4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7116	5504 bytes
`font_01_sfnt_off000083bf.bin` `e12c916ff4d19bd111a6003711303789c6680daf5c4c55a37481c614f712e5d3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83BF	10796 bytes

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