Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b119b29beff7c5…

MALICIOUS

PDF

50.0 KB Created: 2020-08-17 07:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f08550b48400e31165c053a07f991f SHA-1: 31f07fd31f5bcd454556033378cd43a45ab3c783 SHA-256: 96b119b29beff7c53af6bea28501fa9cb364fde0bd6476cf213ebad522e5d37e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=template+abantecart+free`. This URL is presented within the document body, disguised as a free template download. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm designed to improve SEO for malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering users into clicking the malicious link, which likely leads to a second-stage payload.

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=template+abantecart+free
    • http://files.destinationhop.com/uploads/1/3/1/4/131453247/1465175.pdf
    • https://cdn.shopify.com/s/files/1/0439/5266/8830/files/inovao_e_esprito_empreendedor_peter_drucker_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/887533444.pdf
    • https://cdn.shopify.com/s/files/1/0429/1821/5846/files/42160728101.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7350/files/vepubuwujove.pdf
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/rumijotewuvunefet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/mitaxevuves.pdf
    • https://cdn.shopify.com/s/files/1/0433/7781/9802/files/animals_and_their_young_ones_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/lilozex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/dovazesexomuwes.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/vexomitijop.pdf
    • https://cdn.shopify.com/s/files/1/0447/5292/8919/files/excell_2400_psi_pressure_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/react_clear_form_after_submit.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_off00008684.bin
f79c86660cddf93353a576d9077dc62ad9a52412924b2f5beb7cb31f6099d6e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8684 5072 bytes
font_01_sfnt_off000097a9.bin
442c6e02859fc3dd2fd3b4b2add09220595b83901e2c8cf37d92c0389803cc98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97A9 10456 bytes

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