PDF malware analysis — malicious · c7bb91e71a509f42

MALICIOUS

PDF

66.3 KB Created: 2020-09-01 23:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ce8e0b00c8987a898efd702d396e63c6 SHA-1: 1a9169d3969b012a717fae7910a8d9c9a994a046 SHA-256: c7bb91e71a509f4233f41ea05ea3103bc068bfe8e64f2d11cde02aa0ac3a0118

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=definition+auditors+report'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous benign Shopify links is likely a tactic to obscure the malicious one. No scripts were extracted from this sample.

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=definition+auditors+report
- https://cdn.shopify.com/s/files/1/0436/0250/9987/files/airport_city_android.pdf
- https://cdn.shopify.com/s/files/1/0432/9432/6942/files/mivok.pdf
- https://cdn.shopify.com/s/files/1/0436/3350/8512/files/96665299420.pdf
- https://cdn.shopify.com/s/files/1/0464/1708/4584/files/rowdy_baby_song_dance_performance_in_tamil.pdf
- https://cdn.shopify.com/s/files/1/0434/8071/1325/files/sifinozuvisumejum.pdf
- https://static.usrfiles.com/ugd/2c8d66_43eed4b796a04669b9b3d1aa28c759bc.pdf
- https://static.usrfiles.com/ugd/daca0d_7ebecc52f2844f5e83742e9020266698.pdf
- https://cdn.shopify.com/s/files/1/0433/6422/1077/files/wewimezem.pdf
- https://cdn.shopify.com/s/files/1/0432/6660/5219/files/diwagewitirajarotusitas.pdf
- https://cdn.shopify.com/s/files/1/0429/0006/2367/files/nopubasalesikituvigut.pdf
- https://cdn.shopify.com/s/files/1/0431/0636/9697/files/51274498800.pdf
- https://cdn.shopify.com/s/files/1/0438/2490/6397/files/57075723625.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_off0000c761.bin` `9e19688a686303b4202002c26ff92ff70e48e4740fe29cce8ad973c64c5f23b7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC761	5004 bytes
`font_01_sfnt_off0000d880.bin` `7271467cedd004702512e784ad8f6813fb0bc07f5e75054bfe58e9bf3dcb8003`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD880	10488 bytes

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