PDF malware analysis — malicious · fc8cf256ae9ffaeb

MALICIOUS

PDF

53.9 KB Created: 2020-08-10 01:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b850471cd8cc4337b3e4fe531d343d43 SHA-1: 60f4ffd346be941e850b2c977ecb963da87a0859 SHA-256: fc8cf256ae9ffaeb56d86339b57e3b3498043fbfa2a376575c086d35370dd14b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=mathematical+inequalities+reasoning+pdf
- http://files.athensprep.org/uploads/1/3/0/7/130775304/bonuda.pdf
- http://vadupalo.ofcourseyoucantravel.com/uploads/1/3/0/7/130739267/sekolamanekur.pdf
- http://files.samuel-evans.co.uk/uploads/1/3/1/3/131379149/xujelo-jirokesaxuzu.pdf
- http://files.georgehi.net/uploads/1/3/2/6/132682048/bujeb_didizetidazipi.pdf
- http://files.inspiralpathways.com/uploads/1/3/1/0/131070520/nokaruj.pdf
- https://cdn.shopify.com/s/files/1/0431/4556/0219/files/lulubuwivenedik.pdf
- https://cdn.shopify.com/s/files/1/0431/6879/2732/files/binary_number_system_mcq.pdf
- https://cdn.shopify.com/s/files/1/0433/7080/7459/files/81361125546.pdf
- https://cdn.shopify.com/s/files/1/0433/0792/5654/files/sunufetabasal.pdf
- https://cdn.shopify.com/s/files/1/0438/4076/6109/files/ximefeb.pdf
- https://cdn.shopify.com/s/files/1/0432/0867/1394/files/75601127002.pdf
- https://cdn.shopify.com/s/files/1/0437/8070/2366/files/54138162730.pdf
- https://cdn.shopify.com/s/files/1/0434/6642/4470/files/33027785873.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zogubarekerebadopotuleju.pdf
- https://cdn.shopify.com/s/files/1/0429/8499/7025/files/fuminawutigagurew.pdf
- https://cdn.shopify.com/s/files/1/0438/4620/5602/files/online_editor_free_trial.pdf
- https://cdn.shopify.com/s/files/1/0432/2010/7424/files/56647313046.pdf
- https://cdn.shopify.com/s/files/1/0432/1257/0783/files/dulofewuwusozitevovula.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_off00009281.bin` `92f6058c5e139312585fe748150db13e7fb49e494445e3cbc961fe44371faa83`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9281	5700 bytes
`font_01_sfnt_off0000a5bf.bin` `dab9ae64de7359a8398dc2f0c0280826c43935b7bbb71afebdc3566141ea14de`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA5BF	10828 bytes

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