PDF malware analysis — malicious · 4ca4eb3742f361f4

MALICIOUS

PDF

41.4 KB Created: 2020-08-04 20:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fda0657c121d52c9a889609b1330d21b SHA-1: d59b3739d1c65465e3cdbf233d72a586d6e31180 SHA-256: 4ca4eb3742f361f49482c8552dcbf98cceead732c13117035a120b9afddb6fa0

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document body itself contains numerous links to external PDFs hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic to distribute the malicious redirector. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=adeste+fideles+latin+pdf
- http://files.norwichmonument.com/uploads/1/3/1/4/131407558/lafuwes.pdf
- http://xelubu.davidgreenlee.com/uploads/1/3/0/7/130739919/mabotixufiz.pdf
- http://files.alliekonkoldesign.com/uploads/1/3/2/6/132695578/vimudaxorodefokev.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19085525902.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80023348890.pdf
- https://cdn.shopify.com/s/files/1/0436/7430/4662/files/85414020057.pdf
- https://cdn.shopify.com/s/files/1/0433/7975/3121/files/82884853945.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
- https://cdn.shopify.com/s/files/1/0430/9372/1255/files/misige.pdf
- https://cdn.shopify.com/s/files/1/0431/0096/2977/files/35479424052.pdf
- https://cdn.shopify.com/s/files/1/0428/9927/5935/files/81631287349.pdf
- https://cdn.shopify.com/s/files/1/0431/5512/8477/files/paganatasewurok.pdf
- https://cdn.shopify.com/s/files/1/0428/1260/4582/files/41265671389.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_off000065d4.bin` `76d854f3a2db0044310c3ac7795a5d5bf473e8082f11e34bcfa4e0386d19c861`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65D4	4928 bytes
`font_01_sfnt_off000076b2.bin` `14f403b4fa23245625c1b8587ee5e0dda68d7592711cace0223250cd76c152b8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76B2	10052 bytes

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