PDF malware analysis — malicious · f4eff6c4b3d9ba81

MALICIOUS

PDF

50.5 KB Created: 2020-08-15 01:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b629a6115755b22de3c9f914b7bbcbed SHA-1: 39d5b010dc616e075c88cfdd837bd60f2b33e26f SHA-256: f4eff6c4b3d9ba81a81f9d1c0c597f8ef4b981e676ed75b5ebc923581d2866de

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text but includes the URL for the malicious redirector, suggesting a lure for SEO poisoning or phishing.

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.ru/pify?keyword=html+color+codes+pdf+file+free
- http://files.esparzafc.com/uploads/1/3/1/4/131452922/kovopibikusobi.pdf
- http://files.trishgipsonphysio.com/uploads/1/3/2/6/132682051/7270024.pdf
- http://files.eddiejosemorales.com/uploads/1/3/1/4/131407233/ripojove_kejiroduvi_wegapotib.pdf
- https://cdn.shopify.com/s/files/1/0431/8180/1629/files/kurigimizikuv.pdf
- https://cdn.shopify.com/s/files/1/0435/5103/1447/files/nejabibavilaf.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdf
- https://cdn.shopify.com/s/files/1/0431/3749/9302/files/60650563909.pdf
- https://cdn.shopify.com/s/files/1/0432/6565/4946/files/65152770514.pdf
- https://cdn.shopify.com/s/files/1/0428/3577/1558/files/54986341355.pdf
- https://cdn.shopify.com/s/files/1/0438/7612/2779/files/catalogo_eudora_dezembro_2020.pdf
- https://cdn.shopify.com/s/files/1/0434/0911/3242/files/not_enough_items_mod.pdf
- https://cdn.shopify.com/s/files/1/0428/7656/7711/files/11759369851.pdf
- https://cdn.shopify.com/s/files/1/0433/8283/3308/files/22847864453.pdf
- https://cdn.shopify.com/s/files/1/0438/6367/0944/files/guru_mann_muscle_gain_diet.pdf
- https://cdn.shopify.com/s/files/1/0428/8996/9820/files/mukugasoro.pdf
- https://cdn.shopify.com/s/files/1/0436/2603/7411/files/81176453610.pdf
- https://cdn.shopify.com/s/files/1/0439/0515/5227/files/bed_sheet_texture_images.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.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_off0000698a.bin` `cd0cce301b4f144df3392448a620465e2b92ff9e5c76cc19b96ec0c456654dea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x698A	5052 bytes
`font_01_sfnt_off00007aa2.bin` `10f4221919f573f2d3a28026f76337dcf432f2a77871571def080c4789626f0e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AA2	24444 bytes

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