PDF malware analysis — malicious · 06f686ef5b6aa9f5

MALICIOUS

PDF

35.9 KB Created: 2020-08-30 22:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0951fd3ce4aa14bacb6f216916902849 SHA-1: 001318d835b0752a28753d07889c8f2cd5e8fbd2 SHA-256: 06f686ef5b6aa9f5d8d1653e3fa9e444001a08dbe1907b37e932234261da9c87

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Rockwell beaver lathe manual'. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm designed to obscure the malicious redirector. The ML classifier strongly indicates malicious intent.

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=rockwell+beaver+lathe+manual
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/756799_b5e4a99d96e44574953340193a4055c4.pdf
- https://static.usrfiles.com/ugd/7ff653_18280765ab1f43cd8067046e665ed39f.pdf
- https://static.usrfiles.com/ugd/b8c837_a1e84343a25045e0af5817545cbc537a.pdf
- https://static.usrfiles.com/ugd/a4e402_9e5622e434c04541aebb6aaaeb841784.pdf
- https://static.usrfiles.com/ugd/0cd019_744571fd51a8434b822d8b72c77ca546.pdf
- https://static.usrfiles.com/ugd/34e21e_c4c61c21593849fea5b2780dbea25066.pdf
- https://static.usrfiles.com/ugd/ace02d_2de6433b4f194ebab7527d7c2e2599ad.pdf
- https://cdn.shopify.com/s/files/1/0431/4585/5137/files/11135518656.pdf
- https://cdn.shopify.com/s/files/1/0439/2960/0155/files/28046659567.pdf
- https://cdn.shopify.com/s/files/1/0437/7349/3406/files/xiludivavimute.pdf
- https://cdn.shopify.com/s/files/1/0431/4306/9845/files/basic_of_stock_market.pdf
- https://cdn.shopify.com/s/files/1/0433/3476/2654/files/89176678631.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_off00004dea.bin` `f6275df6053f629ab16ad2df1c27dc8605c016373276ef03b50009c768c48a91`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4DEA	5224 bytes
`font_01_sfnt_off00005f9b.bin` `8cff12644df80f92559db51f731c9f57928a7bdb13d8b66366a21ca8cef91062`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F9B	10380 bytes

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