PDF malware analysis — malicious · 1a8e75af55b31bc4

MALICIOUS

PDF

47.9 KB Created: 2020-08-09 01:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9b2ab2761a54aa607323d8bfc410f54e SHA-1: 1148f56bb9cdd6cf099eaf1857e50f8de5a8ac8f SHA-256: 1a8e75af55b31bc415e366e1bc7f60794c59d946cc308ad2e983c9387707409b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as information about peripheral artery disease treatment. This link points to ttraff.ru, which is flagged as malicious. The document also contains a large number of embedded links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination. 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.ru/pify?keyword=peripheral+artery+disease+treatment+pdf
- http://files.italianstonedesign2019.com/uploads/1/3/0/7/130775921/33de9fbc0.pdf
- http://files.myfutra.com/uploads/1/3/1/3/131384018/netax.pdf
- http://files.codywbenjamin.com/uploads/1/3/2/7/132710627/1164149.pdf
- http://files.peakhealthcaremaryland.com/uploads/1/3/1/4/131406816/rizapisopasiraluzoga.pdf
- https://cdn.shopify.com/s/files/1/0435/4798/4026/files/55618246920.pdf
- https://cdn.shopify.com/s/files/1/0434/0298/5621/files/prevention_of_sc_st_atrocities_act.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
- https://cdn.shopify.com/s/files/1/0428/6359/1590/files/tapitokivadivinus.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.pdf
- https://cdn.shopify.com/s/files/1/0428/2561/3468/files/jagurewa.pdf
- https://cdn.shopify.com/s/files/1/0435/9746/3714/files/68475827322.pdf
- https://cdn.shopify.com/s/files/1/0437/4380/5594/files/27256324011.pdf
- https://cdn.shopify.com/s/files/1/0437/5547/1002/files/fowipiro.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55079075607.pdf
- https://cdn.shopify.com/s/files/1/0428/3367/4396/files/nizilakekituxararopowu.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
- https://cdn.shopify.com/s/files/1/0436/9491/5738/files/9595374139.pdf
- https://cdn.shopify.com/s/files/1/0438/3378/6530/files/7583310402.pdf
- https://medlineplus.gov/peripheralarterialdisease.html
- 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_off00007c7d.bin` `b7749cf54c0a9e016b2bb6bdb4401d24b01611e4aed182eefcae1ae0feec008e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C7D	5384 bytes
`font_01_sfnt_off00008ea6.bin` `22196ffd848630f7641a8722956ce1e6361fcbe660bab5cd058f0bcc8b3aa53b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EA6	10452 bytes

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