Malicious PDF — malware analysis report

Static analysis result for SHA-256 296ef1ef28e8ab40…

MALICIOUS

PDF

58.3 KB Created: 2020-08-09 09:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acae7c1b6ea1da7d55357c5b6a1c4ae2 SHA-1: 022bafd18990f00457ba9ad2f2108d3fc0969125 SHA-256: 296ef1ef28e8ab405b70d0e969525aa18183081ca7162c1b86cfc838df46c554
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link pointing to 'ttraff.com', which is flagged as malicious. Additionally, it hosts a large number of external PDF links, many of which are generated SEO-style links pointing to Shopify domains. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=bus+166+schedule+pdf', suggesting a lure to download a schedule PDF. 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.com/pify?keyword=bus+166+schedule+pdf
    • http://files.kerrilynmerinos.com/uploads/1/3/2/6/132696483/6096990.pdf
    • http://muxil.abernathyband.com/uploads/1/3/1/3/131380600/mofuxug.pdf
    • http://neronid.vocalrevz.org/uploads/1/3/1/3/131380600/jugijisumukalave.pdf
    • https://cdn.shopify.com/s/files/1/0433/6618/7176/files/honda_gcv160_oil_capacity.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/68477512862.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/sebop.pdf
    • https://cdn.shopify.com/s/files/1/0432/2639/8888/files/theological_anthropology_a_guide_for_the_perplexed.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/93272352184.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/install_git_on_linux.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8170/files/vajaziritilodaposub.pdf
    • https://cdn.shopify.com/s/files/1/0437/0671/2219/files/28561920147.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/willpower_baumeister.pdf
    • https://cdn.shopify.com/s/files/1/0436/4815/5806/files/benihana_orlando_menu.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_off00009b78.bin
107d3f53004c8a6552270d61ebcfc76e7f61bceb2fc83ac6715d78d0cee5e54c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B78 5192 bytes
font_01_sfnt_off0000ad2f.bin
ba62300fa3d8df35d32cd156fa8a47bde94eb92c116a703b81e6bf975262cc94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2F 15280 bytes

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