PDF malware analysis — malicious · d5cb0f8821198b11

MALICIOUS

PDF

51.9 KB Created: 2020-08-08 14:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b4443ce624b708bb7c8e69735ca5c2af SHA-1: fdf05ea4ba53b187981842cf7dd939899827cd2c SHA-256: d5cb0f8821198b1148d0c52764a37892c29177d2dddcdf364425bffad71b9bbd

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The primary malicious link, https://ttraff.ru/pify?keyword=abstract+algebra+beachy+3rd+edition+pdf, is identified as a redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a link farm designed to manipulate search engine results and lure victims. The ML classifier strongly indicates malicious intent.

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=abstract+algebra+beachy+3rd+edition+pdf
- http://files.heartandminddevon.co.uk/uploads/1/3/2/6/132682701/4605415.pdf
- http://files.geraldinepilgrim.com/uploads/1/3/2/8/132815346/6780435.pdf
- http://pazona.pcrws.com/uploads/1/3/1/4/131408100/butifebixavib_kumure_nakigobesa_kalab.pdf
- https://cdn.shopify.com/s/files/1/0432/1912/4382/files/jokegodekewosoma.pdf
- https://cdn.shopify.com/s/files/1/0437/5304/6165/files/zakidolil.pdf
- https://cdn.shopify.com/s/files/1/0433/9128/7452/files/bipegoma.pdf
- https://cdn.shopify.com/s/files/1/0436/9973/2633/files/58685054109.pdf
- https://cdn.shopify.com/s/files/1/0435/5925/6225/files/36295883520.pdf
- https://cdn.shopify.com/s/files/1/0435/0102/7493/files/37111270968.pdf
- https://cdn.shopify.com/s/files/1/0427/9179/6902/files/88865277909.pdf
- https://cdn.shopify.com/s/files/1/0432/9878/3382/files/92607278078.pdf
- https://cdn.shopify.com/s/files/1/0432/1771/5361/files/55036723598.pdf
- https://cdn.shopify.com/s/files/1/0439/1780/3675/files/76779502355.pdf
- https://cdn.shopify.com/s/files/1/0431/0633/6930/files/2nd_puc_biology_important_questions_with_answers_download.pdf
- https://cdn.shopify.com/s/files/1/0430/9850/5369/files/park_big_blue_book_of_bicycle_repair.pdf
- https://cdn.shopify.com/s/files/1/0436/4566/5433/files/51744983753.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_off00008902.bin` `3bb9934aa0784b420ed07bb3511a0d9bb13e79a9d8bd101d332c6ad4fb83da03`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8902	5812 bytes
`font_01_sfnt_off00009cc4.bin` `f884b459b6f6d576af7028fa8cdd6b72fe85ca668fb12f1c1a13cbd41c1d3288`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CC4	11004 bytes

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