PDF malware analysis — malicious · c002c0f429c1c69b

MALICIOUS

PDF

39.2 KB Created: 2020-09-02 06:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 33f4e23a9ded31d59268f272a0b5f3c7 SHA-1: 5600206fd7358da12b907383bcaf39d4e3606636 SHA-256: c002c0f429c1c69bd40aa0285982ef2120e43471f48c94bc8a4c7dbdf44d7ef4

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector service, which is a common technique for delivering malicious payloads. The document body, though heavily obfuscated, contains text related to 'Champion sweatpants size guide' and the malicious URL, suggesting a lure. The presence of numerous Shopify URLs, some confirmed benign and others unknown, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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.ru/pify?keyword=champion+sweatpants+size+guide
- https://cdn.shopify.com/s/files/1/0436/2164/6498/files/zegutiwet.pdf
- https://cdn.shopify.com/s/files/1/0436/3943/9510/files/libro_de_formacion_civica_y_etica_3_de_secundaria_contestado_2019.pdf
- https://cdn.shopify.com/s/files/1/0437/9007/4005/files/appsc_calendar_2020.pdf
- https://cdn.shopify.com/s/files/1/0429/1874/0134/files/zisojepawoxurumofax.pdf
- https://cdn.shopify.com/s/files/1/0436/9140/9562/files/95259612206.pdf
- https://static.usrfiles.com/ugd/909b15_e712a238b9be463aae94858af62be1cb.pdf
- https://static.usrfiles.com/ugd/1479de_ed4af99e5bd14041b7471f86355d93e4.pdf
- https://cdn.shopify.com/s/files/1/0428/1604/5222/files/torite.pdf
- https://cdn.shopify.com/s/files/1/0433/1234/9334/files/60847008998.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
- https://cdn.shopify.com/s/files/1/0429/7578/9215/files/2020_ashrae_refrigeration_handbook.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_off00004faa.bin` `a4f865c9b00cba70fd9b7e1e17e96a79f44adc9c5931def4ea286607e55ca96a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4FAA	5292 bytes
`font_01_sfnt_off000061a0.bin` `4c61fe9083e0a5371a96a9b333b1d6bb4cdcf6840f7ac7f3a5ead7fe8be37bed`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61A0	14696 bytes

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