PDF malware analysis — malicious · 8c98ed3238f5d1f3

MALICIOUS

PDF

44.0 KB Created: 2020-08-07 05:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b6ee5d5597fba65a35ad842a192fd825 SHA-1: 2a9b582465127f1c8a9141c7d20883bc8b19eed5 SHA-256: 8c98ed3238f5d1f3082c8b0e0bc12e243ec546ff6b9cf326c3e352aa2aa0e80f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=acr+fibromyalgia+criteria+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and other embedded links, suggesting a lure to external malicious 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.com/pify?keyword=acr+fibromyalgia+criteria+pdf
- http://files.pranaya.org/uploads/1/3/0/9/130969874/4819d5a9c2a03.pdf
- http://files.singersandactorsworkshop.com/uploads/1/3/2/7/132740218/mubazaxumadajag.pdf
- http://files.sgtnatefitness.com/uploads/1/3/0/9/130969405/kiwerawemu.pdf
- https://cdn.shopify.com/s/files/1/0433/7182/3262/files/gerururuwixi.pdf
- https://cdn.shopify.com/s/files/1/0432/9222/9797/files/29830648687.pdf
- https://cdn.shopify.com/s/files/1/0434/1858/3192/files/tanefuveragulerev.pdf
- https://cdn.shopify.com/s/files/1/0431/2537/5130/files/suzuki_m50_service_manual.pdf
- https://cdn.shopify.com/s/files/1/0431/6397/5835/files/37568583818.pdf
- https://cdn.shopify.com/s/files/1/0431/4077/6090/files/62370544044.pdf
- https://cdn.shopify.com/s/files/1/0431/9536/7585/files/15314408894.pdf
- https://cdn.shopify.com/s/files/1/0430/6717/9165/files/16507298301.pdf
- https://cdn.shopify.com/s/files/1/0433/6356/5727/files/23900725091.pdf
- https://cdn.shopify.com/s/files/1/0435/6630/1343/files/lowes_hot_springs_ar.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rajijabobuzev.pdf
- https://cdn.shopify.com/s/files/1/0435/3071/5288/files/craftsman_6._5_hp_lawn_mower_manual.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_off0000615f.bin` `25d24b04ae4ad2e12208ce8b1e09790206c65d5538bd4f25a0efcfaf18631eef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x615F	3592 bytes
`font_01_sfnt_off00006e2d.bin` `c22dadf2a468b116c43ba7925b9816dbad21141c68cf0334c79cae0530b93d82`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E2D	5528 bytes
`font_02_sfnt_off000080f0.bin` `55e8af7f00adc754f13c362456961bf620bcc3303cc215b628eed87652f1ba48`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80F0	9908 bytes

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