PDF malware analysis — malicious · 57146905677ab1ad

MALICIOUS

PDF

36.5 KB Created: 2020-08-14 03:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b105959eae7221fdbf9f806801bcaaf2 SHA-1: 6b0c69b00c5e98dc72d3f7e75ab8aaad3a9480c3 SHA-256: 57146905677ab1ad08b41fac2cbe28c7fdcb37652969f797355b608571de023a

150 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO poisoning or link farm abuse. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=flex+banner+background+images`. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body is heavily obfuscated, but the link farm and redirector strongly suggest a malicious intent to direct users to harmful content.

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=flex+banner+background+images
- http://files.oxtapas.com/uploads/1/3/0/8/130814402/b673cb0681fd193.pdf
- http://files.glendaleartassociation.com/uploads/1/3/0/8/130814475/ditupeduru_gifatupadovo.pdf
- http://files.drbuba-best-traditional-healer.com/uploads/1/3/2/7/132710563/2a86be49430f.pdf
- https://cdn.shopify.com/s/files/1/0430/8896/9882/files/53794314978.pdf
- https://cdn.shopify.com/s/files/1/0431/7439/6058/files/65087717060.pdf
- https://cdn.shopify.com/s/files/1/0428/5035/3318/files/pitiwikirodajadibisipajuj.pdf
- https://cdn.shopify.com/s/files/1/0432/2859/4336/files/soxana.pdf
- https://cdn.shopify.com/s/files/1/0436/9675/0742/files/122411783.pdf
- https://cdn.shopify.com/s/files/1/0433/2093/4558/files/61356316705.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
- https://cdn.shopify.com/s/files/1/0432/7361/7568/files/lil_bibby_afternoon_download.pdf
- https://cdn.shopify.com/s/files/1/0431/3199/4280/files/roxaxezurugosuwog.pdf
- https://cdn.shopify.com/s/files/1/0435/2576/7320/files/53527374779.pdf
- https://cdn.shopify.com/s/files/1/0431/3353/4357/files/alaska_airlines_sustainability_report_2018.pdf
- https://cdn.shopify.com/s/files/1/0430/6187/0743/files/lulak.pdf
- https://cdn.shopify.com/s/files/1/0434/6193/5261/files/44497892133.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_off00005151.bin` `d84aa00ff54eb8f5a898bb0a446043f123c3dbdda67e2b22f4a51d5418d81f45`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5151	5484 bytes
`font_01_sfnt_off000063df.bin` `3d91f1fb9c5073802435fe141c58513bbf8a1d7fcd10e7d366fe30826280fed0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63DF	9656 bytes

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