Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcaea8bae0a0a78d…

MALICIOUS

PDF

50.2 KB Created: 2020-08-06 04:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cba6390640a3e6db23880359220058d SHA-1: 7a819511a2c0920040ab938f08d89ad872d0d88b SHA-256: fcaea8bae0a0a78db94ff39d64ea11bea68a336d147a7c96bfd12316848143f1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a lure related to IELTS academic reading practice tests, which is a common tactic for phishing or malware delivery. It embeds a link that redirects to 'ttraff.cc', identified as a malicious redirector. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content or to distribute further payloads. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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=ielts+academic+reading+practice+test+2020+pdf
    • http://files.mrflemingscience.com/uploads/1/3/0/8/130874488/9f21f53a971084d.pdf
    • http://divezama.adclife.com/uploads/1/3/0/7/130739275/dogadenoke.pdf
    • http://files.victoriaprather.com/uploads/1/3/0/7/130775274/368c46e.pdf
    • https://cdn.shopify.com/s/files/1/0434/1432/3356/files/32383203573.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/bloqueo_av_de_primer_grado_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/lunikokogiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/23016736736.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/archicad_rendering_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/falanokumufipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/87297650719.pdf
    • https://cdn.shopify.com/s/files/1/0433/4089/0262/files/14069340644.pdf
    • https://cdn.shopify.com/s/files/1/0436/3019/8937/files/wukasabibodekujire.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0163/files/waxelonasifovare.pdf
    • https://cdn.shopify.com/s/files/1/0431/7865/5903/files/all_about_me_preschool_worksheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9635/0624/files/characteristics_of_romanticism_in_american_literature.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_off00007b40.bin
de08e6e42165e12addbb64b4da14278c7f4e0da13e4b6566650f08ba4f8c66f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B40 5688 bytes
font_01_sfnt_off00008e89.bin
8c8f9f9d0a2e141abe35c58d83750613ce04a948be933b3ad113224b15937f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E89 16792 bytes

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