PDF malware analysis — malicious · f2ecd052da8fc987

MALICIOUS

PDF

50.3 KB Created: 2020-08-21 10:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ad4e3c45420c00b6e3a69046e56e0dc8 SHA-1: 3133e27570c054c24c341293d5c754472e04a1ac SHA-256: f2ecd052da8fc987883a71c0f52796b5b3217a5f7dbb5d2fb763de066f5882be

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a Dell server datasheet and the malicious URL, suggesting a lure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to malicious infrastructure, and the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation to increase visibility. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=dell+poweredge+r740+server+datasheet+pdf
- http://files.foxnet.xyz/uploads/1/3/1/6/131636965/kavorupikedivo-jemukemub.pdf
- http://files.morrischamber.org/uploads/1/3/1/1/131163867/kemabemadoraxo_rewarorapusupol_migumus_dowero.pdf
- https://cdn.shopify.com/s/files/1/0428/1381/6995/files/xiselorejozetukose.pdf
- https://cdn.shopify.com/s/files/1/0434/2333/4565/files/uniforme_atletico_san_luis_dream_league_soccer.pdf
- https://cdn.shopify.com/s/files/1/0435/2661/9288/files/21523779403.pdf
- https://cdn.shopify.com/s/files/1/0433/7958/9283/files/battleground_survivor_battle_royale_apk_uptodown.pdf
- https://cdn.shopify.com/s/files/1/0430/0180/6997/files/57983472875.pdf
- https://cdn.shopify.com/s/files/1/0428/8937/9993/files/19394841722.pdf
- https://cdn.shopify.com/s/files/1/0431/1905/0908/files/59122610751.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
- https://cdn.shopify.com/s/files/1/0434/0816/2981/files/tulivopiliwe.pdf
- https://cdn.shopify.com/s/files/1/0437/6569/4613/files/73895180032.pdf
- https://cdn.shopify.com/s/files/1/0437/2532/4439/files/meiosis_vs_mitosis.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000766f.bin` `b5f92cb26637e988e1183349ed4ed6b2245cdf96db57d7b8696e432595382f7f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x766F	5400 bytes
`font_01_sfnt_off0000890e.bin` `62f89e889dee3410c91da8e064abc86db0fc771c8b96ac4e9ea841e8ad34a845`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x890E	10724 bytes
`font_02_sfnt_off0000adb7.bin` `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xADB7	4324 bytes

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