PDF malware analysis — malicious · c9f135299de8ef0c

MALICIOUS

PDF

45.9 KB Created: 2020-08-20 12:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9bfd785b09e18e81ee281a734043cc2f SHA-1: a34e89c43ee5e3743f21606dc0cfcb85d58360a6 SHA-256: c9f135299de8ef0c2a3b89975dfd06f826c925cee143a0bb24029f51dd74942d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to 'plastic ground sheet pegs' and appears to be generated by wkhtmltopdf, suggesting a potential SEO-based link farm or phishing lure. The ML classifier strongly flagged this PDF as malicious.

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=plastic+ground+sheet+pegs
- http://files.anfgmnetwork.net/uploads/1/3/0/8/130813526/9267440.pdf
- http://files.thenesthudson.com/uploads/1/3/1/4/131408954/487730b4aec.pdf
- https://cdn.shopify.com/s/files/1/0431/4290/6007/files/santa_baby_duet_sheet_music.pdf
- https://cdn.shopify.com/s/files/1/0429/5249/1159/files/vsco_cam_apk_todos_los_filtros_2019.pdf
- https://cdn.shopify.com/s/files/1/0432/6545/8336/files/business_information_security_officer_jobs.pdf
- https://cdn.shopify.com/s/files/1/0429/7143/1065/files/tonokujali.pdf
- https://cdn.shopify.com/s/files/1/0441/1952/3480/files/5516625605.pdf
- https://cdn.shopify.com/s/files/1/0431/3546/7682/files/76222333225.pdf
- https://cdn.shopify.com/s/files/1/0429/5501/4298/files/23628885563.pdf
- https://cdn.shopify.com/s/files/1/0431/6499/1649/files/37549305100.pdf
- https://cdn.shopify.com/s/files/1/0430/7812/3669/files/zerulidebazef.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdf
- https://cdn.shopify.com/s/files/1/0428/0510/0707/files/xojuvuse.pdf
- https://cdn.shopify.com/s/files/1/0433/3358/2998/files/95442287734.pdf
- https://cdn.shopify.com/s/files/1/0431/6341/8784/files/law_of_cosine_formula.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_off00005a42.bin` `f3efea0b743e765d91b310c55279645f8094bf4d2a621d3e42c20faa53808ca8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A42	5220 bytes
`font_01_sfnt_off00006be7.bin` `d338a6189990e386d848fc14ae7d85f2e5a5c3468d3d3a3485a34c2098137b52`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BE7	15336 bytes
`font_02_sfnt_off00009b01.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B01	4324 bytes

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