PDF malware analysis — malicious · 2611e0e96496e5d7

MALICIOUS

PDF

43.0 KB Created: 2020-08-11 16:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c0cca9b498e2ff6ab4debe611f3c82a3 SHA-1: bbdacdfd0551cdc16230308887ca5116debdbdee SHA-256: 2611e0e96496e5d71cf0b3cff033dd7dffd29eec435c7f7865a7ddf66c61969f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=admixture+in+concrete+pdf'. The document body, though heavily obfuscated, contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=admixture+in+concrete+pdf
- http://files.wristybiz.com/uploads/1/3/0/7/130775676/vokolurenem_wunadozami.pdf
- http://files.psepa.org/uploads/1/3/2/6/132682826/ribipuder.pdf
- http://files.spanish.thelanguagehub.net/uploads/1/3/0/7/130740465/1497352.pdf
- https://cdn.shopify.com/s/files/1/0429/5750/4668/files/556087451.pdf
- https://cdn.shopify.com/s/files/1/0434/0262/5178/files/63873700914.pdf
- https://cdn.shopify.com/s/files/1/0433/1274/2550/files/jailbreaking_ios_7._1._2_iphone_4.pdf
- https://cdn.shopify.com/s/files/1/0432/2508/8168/files/zamatuzeva.pdf
- https://cdn.shopify.com/s/files/1/0440/5778/8568/files/carbon_steel_grades_and_properties.pdf
- https://cdn.shopify.com/s/files/1/0430/5934/7618/files/77824171529.pdf
- https://cdn.shopify.com/s/files/1/0428/0628/0355/files/27038042630.pdf
- https://cdn.shopify.com/s/files/1/0431/8769/9876/files/silabus_osn_biologi_sma.pdf
- https://cdn.shopify.com/s/files/1/0431/8691/3431/files/64828759769.pdf
- https://cdn.shopify.com/s/files/1/0431/1220/2389/files/kinetics_of_anionic_polymerization.pdf
- https://cdn.shopify.com/s/files/1/0429/2070/6204/files/52784384151.pdf
- https://cdn.shopify.com/s/files/1/0431/7675/5349/files/46022645800.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006022.bin` `fccb12b2b2a8f5b8f9fca4152c21611703724deb546a452413d693b8b757540b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6022	4820 bytes
`font_01_sfnt_off00007069.bin` `86e66afa66305a478aba1106e415193f3a743c7d6699e1c6f0fe147c706f3d49`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7069	9580 bytes
`font_02_sfnt_off0000911a.bin` `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x911A	4324 bytes

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