PDF malware analysis — malicious · bb494f33b61639d0

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 16:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2e8a986ce768964051521705d5c0d926 SHA-1: b34a6d0db66388c3cefff5ffb92692a80a992e44 SHA-256: bb494f33b61639d0cb86d3c729a9482c5007f16cdacb89084fa70a0175503303

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.cc/wix?keyword=microsoft+access+2016+manual+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to 'microsoft access 2016 manual pdf', suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or to obscure the 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.cc/wix?keyword=microsoft+access+2016+manual+pdf
- https://cdn.shopify.com/s/files/1/0427/5005/0460/files/kafalozupoxofene.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
- https://cdn.shopify.com/s/files/1/0440/5932/8662/files/echelon_form_calculator.pdf
- https://cdn.shopify.com/s/files/1/0430/7891/0106/files/91420418441.pdf
- https://cdn.shopify.com/s/files/1/0439/5397/9550/files/nms_surgery_casebook_free.pdf
- https://static.usrfiles.com/ugd/32777b_74af38d5232547789217b8017aec6c6c.pdf
- https://static.usrfiles.com/ugd/b8c837_8e05623e3ceb464f836ccff069055db1.pdf
- https://static.usrfiles.com/ugd/b8c837_9984b42ff7c04735a62bdf43673d3922.pdf
- https://static.usrfiles.com/ugd/08fe48_bad0c4b1359e410aa2a5aff4e6bce673.pdf
- https://static.usrfiles.com/ugd/405339_f7726e39479b4f29ac88c8b2ce42b921.pdf
- https://static.usrfiles.com/ugd/963627_ff00fd6316e64ba0889c1b82819f9da5.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_off00006998.bin` `54756489f819e086b0fc23b0402f5b8d0aa8b695eb1364df4d25a9373a8d8ffd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6998	5784 bytes
`font_01_sfnt_off00007d30.bin` `626c0c4efd7a8ed3c46d5318d2c22d9acd85732fd58b41fd017a6c95734033d8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D30	10960 bytes

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