PDF malware analysis — malicious · 8d613632d673af2c

MALICIOUS

PDF

40.9 KB Created: 2020-08-16 17:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: adc92868db2bbf591e064383d11060b1 SHA-1: 0684c51a0cf1ba678bba8c66c81bf7091b4b82a7 SHA-256: 8d613632d673af2c5922e7a480e45090515e8546557092f3077930b52c2ea0fd

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link: Malicious File

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. One URL, 'https://ttraff.ru/pify?keyword=basics+of+computer+hardware+pdf', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary attack pattern appears to be SEO manipulation rather than direct user compromise.

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=basics+of+computer+hardware+pdf
- http://files.cocoanutgrovethemovie.com/uploads/1/3/0/9/130969313/9cb81.pdf
- http://zesow.briarwoodmashpee.com/uploads/1/3/2/3/132303382/4838a7bcd.pdf
- http://dunat.carolinebrogan.com/uploads/1/3/0/7/130739967/judanekawapotu_xadavizelimu.pdf
- http://pupujidir.katherinemcmahonart.com/uploads/1/3/1/0/131069899/1370564526.pdf
- http://files.doadagny.com/uploads/1/3/1/6/131637385/5248828.pdf
- https://cdn.shopify.com/s/files/1/0432/4088/2343/files/nivoramidapabezulirite.pdf
- https://cdn.shopify.com/s/files/1/0433/6589/2245/files/25498621784.pdf
- https://cdn.shopify.com/s/files/1/0429/6871/1321/files/sezamejunadagulakakigo.pdf
- https://cdn.shopify.com/s/files/1/0437/6346/6391/files/gobogenemamumedikijipen.pdf
- https://cdn.shopify.com/s/files/1/0429/5619/3955/files/dolavanurisumogonexame.pdf
- https://cdn.shopify.com/s/files/1/0431/1128/4893/files/39826559762.pdf
- https://cdn.shopify.com/s/files/1/0443/5968/0156/files/a_flat_stomach_asap.pdf
- https://cdn.shopify.com/s/files/1/0435/5850/2563/files/sesekebixemepuf.pdf
- https://cdn.shopify.com/s/files/1/0431/1190/7488/files/vekukirudabirezoliba.pdf
- https://cdn.shopify.com/s/files/1/0438/1098/0000/files/3._4_biogeochemical_cycles_worksheet_answers.pdf
- https://cdn.shopify.com/s/files/1/0431/4624/8358/files/4162200435.pdf
- https://cdn.shopify.com/s/files/1/0430/0485/4426/files/melamukigara.pdf
- https://cdn.shopify.com/s/files/1/0436/8711/6965/files/zotomesamegaxizazanin.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_off00006188.bin` `7a7ce5392c20dc686cc4992dcc94384b409aedf673a7cc6d98ab85970e85ec94`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6188	5504 bytes
`font_01_sfnt_off00007426.bin` `2c1f2d62804887f8f2836ddd59cc564aff1ba5851e75021e50410f41dba05fba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7426	10132 bytes

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