PDF malware analysis — malicious · 93112fc38b921f50

MALICIOUS

PDF

53.6 KB Created: 2020-07-30 14:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ad0d5aa622fe7f04f9a6f3aa4c373b68 SHA-1: a748e8a93786f791b5e7b54e2c810e745c4821fe SHA-256: 93112fc38b921f5057c9e08f83545f4c14d82b2140d700059f04fe230187f201

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious due to a high number of embedded links, many of which point to external PDF files hosted on various domains, including a significant number on cdn.shopify.com. One critical heuristic indicates these links are part of a redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and appears to contain metadata rather than user-facing content.

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.cc/pify?keyword=l+adjectif+numeral+cardinal+pdf
- http://files.zforcegt.org/uploads/1/3/0/7/130740141/towugifepoxepak-dolasezo-savafu-lewefamine.pdf
- http://files.artbywinette.com/uploads/1/3/1/1/131163780/jikameguneje.pdf
- http://files.verdantrepublic.com/uploads/1/3/1/3/131384101/fc057b18603.pdf
- http://files.singing4ourlives.net/uploads/1/3/1/4/131437626/1c70b6c10.pdf
- http://files.heavygrail.net/uploads/1/3/1/3/131380733/bitat.pdf
- http://files.verdantrepublic.com/uploa
- https://cdn.shopify.com/s/files/1/0433/9331/9079/files/teduxumebupovo.pdf
- https://cdn.shopify.com/s/files/1/0431/2639/0933/files/fediwegujupazol.pdf
- https://cdn.shopify.com/s/files/1/0428/8184/3356/files/tixozipag.pdf
- https://cdn.shopify.com/s/files/1/0428/8544/7833/files/27823774553.pdf
- https://cdn.shopify.com/s/files/1/0434/9755/4084/files/17881012951.pdf
- https://cdn.shopify.com/s/files/1/0434/1009/6284/files/47689751435.pdf
- https://cdn.shopify.com/s/files/1/0432/4062/0200/files/45910635138.pdf
- https://cdn.shopify.com/s/files/1/0435/4198/7479/files/kinudotewej.pdf
- https://cdn.shopify.com/s/files/1/0432/4448/6824/files/runojigeta.pdf
- https://cdn.shopify.com/s/files/1/0439/6145/0654/files/tiwarurodibusezobumuzo.pdf
- https://cdn.shopify.com/s/files/1/0437/5461/9041/files/xukemujovonexe.pdf
- https://cdn.shopify.com/s/files/1/0431/2471/9773/files/kepewizonogemijozavizina.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_off000094cc.bin` `dcf38c9a22347b3f51b5a07328845468a56964c4a5b52453936431ecff90a282`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94CC	4912 bytes
`font_01_sfnt_off0000a564.bin` `d19a6d79a8e9121740b808696c7bed233c1bd4a39503c24ae82edbb2d50bf157`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA564	10772 bytes

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