PDF malware analysis — malicious · 7d58cfb2ab065519

MALICIOUS

PDF

40.9 KB Created: 2020-09-01 04:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b0ea8f9246c67fef59b350f78ea000bb SHA-1: f2ba1c1000d0c08f3a2f1a1ced42f57ed092c2c2 SHA-256: 7d58cfb2ab06551966405001504a6d7954b4f1baf480765ae4bb48f3873500d2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains the URL and text suggesting it is a service manual, likely a lure. The presence of numerous external PDF links, many pointing to 'static.usrfiles.com', further indicates a link farm strategy, potentially for SEO poisoning or distributing further malicious content.

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=bosch+refrigerator+service+manual+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/8127dd_f6a41cb4ee5d4c478f7b6d21755b35d5.pdf
- https://static.usrfiles.com/ugd/269bb8_a619f9e119d742a39a885e743f32efc1.pdf
- https://static.usrfiles.com/ugd/b8c837_e219497cafd84df0b95eed4f89dc739b.pdf
- https://static.usrfiles.com/ugd/e3325f_1dd38c16242e4513925377ca0207ac43.pdf
- https://static.usrfiles.com/ugd/b8c837_0265392217ca4d0c9113f8cf1b3a9dd3.pdf
- https://static.usrfiles.com/ugd/26938b_583d2c73ce8b4c4c94600de4254825a3.pdf
- https://static.usrfiles.com/ugd/086daf_6584ce55723b47f899126e73e3685a62.pdf
- https://static.usrfiles.com/ugd/ee6770_fe29a16b2b5e400f89193c91301d3648.pdf
- https://static.usrfiles.com/ugd/9e53d4_9f3f994f95414759b0b8b9ae68726d90.pdf
- https://cdn.shopify.com/s/files/1/0435/6790/6979/files/vavunaruruvokezelupuget.pdf
- https://cdn.shopify.com/s/files/1/0465/3078/9534/files/61134012998.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000060c2.bin` `5eaeeac7e2010f0cbc178dd6650adff51d16eb0e0e22ac551fcee3482046b35a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60C2	5680 bytes
`font_01_sfnt_off000073f6.bin` `95dd505f63dbe9640132437f5698ac142a5648dc5d2d1d29f0efd88a50618e3f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73F6	10612 bytes

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