PDF malware analysis — malicious · 4f9a2272eb9d2f7c

MALICIOUS

PDF

50.7 KB Created: 2020-07-25 08:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5ffcf7fe9f39295b47136b34de141ab6 SHA-1: 6beb5266da2507ec893dbe4bfcd09bca84d733b3 SHA-256: 4f9a2272eb9d2f7c71eccd66e30a39d1318145f47f1512af10899958f7653fc0

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=counting+coins+practice+worksheets'. Additionally, it exhibits a high-severity heuristic for a clipboard command execution lure, instructing the user to paste content into a shell. The document also hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm or distribution mechanism. No scripts were extracted from this sample.

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.
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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.ru/pify?keyword=counting+coins+practice+worksheets
- http://files.yukonhomes4rent.com/uploads/1/3/1/3/131384636/fixafuvaz.pdf
- http://files.estherhousecares.org/uploads/1/3/1/4/131438308/1f3a60eaf0d9cb7.pdf
- http://files.saraislas.com/uploads/1/3/0/7/130776724/nimizafogiwopikise.pdf
- http://files.rununashamed.com/uploads/1/3/1/8/131871744/55aa1e2d6a.pdf
- http://files.yellowstonewritingproject.com/uploads/1/3/0/7/130739265/derisizetepib.pdf
- http://files.yellowstonewritingproject.com/uploads/1/3
- https://cdn.shopify.com/s/files/1/0430/3768/7962/files/76838968396.pdf
- https://cdn.shopify.com/s/files/1/0430/6645/8265/files/dapuxatixibozovugibu.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puxatofutedixa.pdf
- https://cdn.shopify.com/s/files/1/0429/8535/7463/files/pilawelaruli.pdf
- https://cdn.shopify.com/s/files/1/0429/9328/7331/files/34048864207.pdf
- https://cdn.shopify.com/s/files/1/0435/8491/3563/files/71894257132.pdf
- https://cdn.shopify.com/s/files/1/0433/5199/8623/files/bijawatowerekus.pdf
- https://cdn.shopify.com/s/files/1/0429/2391/7478/files/94710304503.pdf
- https://cdn.shopify.com/s/files/1/0429/4007/2092/files/tevawumut.pdf
- https://cdn.shopify.com/s/files/1/0432/1175/1579/files/sorifafopetetozuzad.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_off00008120.bin` `4f8fc6ac89f261fa09e8ab47c938e446ca7468b88dedea75f364d3871df52930`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8120	5224 bytes
`font_01_sfnt_off00009300.bin` `60eace35a94ba77a103a2c1542a0731f595c9fb2ce98cae4c4eed1f746711717`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9300	13672 bytes

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