Malicious PDF — malware analysis report

Static analysis result for SHA-256 4344df95cf28335a…

MALICIOUS

PDF

38.6 KB Created: 2020-07-27 11:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa622c71359ae984d789f7fde21a636b SHA-1: dd89babbb6f8cf1ede48af1b6d06226e10741763 SHA-256: 4344df95cf28335a24e1a75e00bbc0ca1d5b396fd1f82b2cba6474d81a0d421e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially harmful sites under the guise of providing PDF resources.

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/wb?keyword=nuevo%20diccionario%20biblico%20ilustrado%20vila%20escuain%20pdf
    • http://files.fmta.org/uploads/1/3/0/8/130813362/rogulapibatuwovuvi.pdf
    • http://files.suemorton.com/uploads/1/3/2/7/132740519/xetenupugefodur_gadofuvojor_piwixitel_merop.pdf
    • http://files.dndamsels.com/uploads/1/3/0/7/130775551/3863589.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/67335310923.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/fizafunanevezuxajupaxopat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9364/6753/files/kavijefipok.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3081/files/bawunetelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/51702235812.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/dusegapumizurozipafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8917/files/82415769840.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/lusapafodikesudatuwagad.pdf
    • https://cdn.shopify.com/s/files/1/0428/1093/3414/files/16439334583.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/guziwexejavufir.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/74908129198.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1443/files/zofagakew.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.

FilenameKindSourceSize
font_00_sfnt_off000059d1.bin
3fd33202b936282ffe55bb203d059bfcb29c15cf65cdc3fa3dd0031fe74a3402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D1 5200 bytes
font_01_sfnt_off00006b8a.bin
23f64e6b72fcc88593916bf76fc69371b7f7d379d95a799f03a6fd79db3368ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8A 9764 bytes

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