PDF malware analysis — malicious · 1fbd0edf30584568

MALICIOUS

PDF

38.9 KB Created: 2020-08-30 04:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 851db7fa0c686999debd4d75ce68b149 SHA-1: b6cb8a3c35a031006832b1cb42817e86fba98081 SHA-256: 1fbd0edf30584568c550cf2b28606307c68fdb5d6708b3c228e23043051accc8

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=al+811+amp+manual'. Additionally, it exhibits a PDF link farm heuristic, with 24 external PDF links, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same URL and a reference to 'Al 811 amp manual', suggesting a lure to download or view a document, which then redirects to malicious content. The presence of a 'Visual download / call-to-action button lure' heuristic further supports this. No scripts were extracted, and the PDF structure itself does not indicate exploitation, but rather social engineering via links.

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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=al+811+amp+manual
- https://static.usrfiles.com/ugd/6da380_dbaa662311d54205a391d0bda94adba9.pdf
- https://static.usrfiles.com/ugd/1decf9_1b519acd282e4b639a567bcad8253f6a.pdf
- https://static.usrfiles.com/ugd/f63f29_781dd41e40164ab2b5af92a75aaff650.pdf
- https://static.usrfiles.com/ugd/b8c837_efd35249ba134561b3e8a6ddc2c84531.pdf
- https://static.usrfiles.com/ugd/d01287_c4a78481f2a7464383cce7829d6466fb.pdf
- https://static.usrfiles.com/ugd/0df15e_81ec43c8da4342f3973d237ec2a35be8.pdf
- https://static.usrfiles.com/ugd/1be480_4017d3d9e3f44b4b8d8d59a384c15431.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69865881622.pdf
- https://cdn.shopify.com/s/files/1/0430/7006/2754/files/86353013850.pdf
- https://static.usrfiles.com/ugd/48d9a1_eed702f8630148f08a8e9ccf95e6f02b.pdf
- https://static.usrfiles.com/ugd/34e21e_30425a1d23d34305a9f034f0af7873aa.pdf
- https://static.usrfiles.com/ugd/5fd5c1_54620794c6f745f695d0055cb8c5610e.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_off00005b94.bin` `e5e8899d5005520e96032c933b6608cba077c6e666753b807cbe220e251e799c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B94	4928 bytes
`font_01_sfnt_off00006c46.bin` `3e658a557fda33a13ba25eae0f87fdecb4102f7e387a81c37fb7dd773d9588a5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C46	10280 bytes

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