Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b55eea5b982b9e…

MALICIOUS

PDF

44.1 KB Created: 2020-08-18 15:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af7917a73e031a6cac1d486e27b19a98 SHA-1: 2c8aa2ffa5dd788b140b92effc7c00c9911b257a SHA-256: 27b55eea5b982b9eb15708d2fc01bc4fe44d0abd272c32085d6a3323a6ba3e77
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though partially corrupted, contains text related to the 'Kiki challenge' and the malicious URL, suggesting a lure to entice users to click the link. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic. No scripts were extracted from this sample.

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.com/pify?keyword=kiki+challenge+original+video+song
    • http://files.ataraxiaphotography.com/uploads/1/3/1/4/131455883/jazozixure.pdf
    • https://cdn.shopify.com/s/files/1/0448/3776/5282/files/2904692343.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/face_benjamin_zephaniah_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/rack_apc_ar3100.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/978489031.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8663/files/kivorogonaximit.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/gupakalogawijuximo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/vumelimikixixusobaluzibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1602/7303/files/cabal_na_client.pdf
    • https://cdn.shopify.com/s/files/1/0429/3020/8924/files/scrivener_templates_fiction.pdf
    • https://cdn.shopify.com/s/files/1/0441/0854/6200/files/juxonin.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/45981353590.pdf
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/samojogaxazorum.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.

FilenameKindSourceSize
font_00_sfnt_off00005e9a.bin
39361ecc349a4e1e441571480e6bea0241e91cadea301c8f81f8f8adec6c1887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9A 5296 bytes
font_01_sfnt_off00007081.bin
98e40f9a41cdf4fd7f144dfca6a4d50468a8167ad26541353193707718639d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7081 3388 bytes
font_02_sfnt_off00007e12.bin
7affb5fb5d64b1506c637578d1326cf0dddadd7a1295d21b8a300f8267a777e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E12 11072 bytes

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