Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee4149060f8cab0…

MALICIOUS

PDF

39.2 KB Created: 2020-08-04 16:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6038c145bf5bc313c8ca861e6c695f6 SHA-1: d97a59c201f8cc4a815b4ad55ff7b35d89e6f373 SHA-256: 0ee4149060f8cab0bfb6e3de0b2de499e6def9cf78b082d7085cd332de2135b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that a link redirects to known malicious infrastructure, specifically `https://ttraff.cc/pify?keyword=printable+bingo+cards+1+75+pdf+free`. The document body, though heavily obfuscated, contains text related to 'printable bingo cards', suggesting a lure to encourage clicks on the malicious links. The presence of numerous PDF links and a redirector strongly suggests an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=printable+bingo+cards+1+75+pdf+free
    • http://files.centralparkwichita.com/uploads/1/3/1/4/131453255/9594955.pdf
    • http://files.kathrynconeway.com/uploads/1/3/0/7/130739769/f1df05.pdf
    • http://files.houseofblackart.com/uploads/1/3/1/8/131871787/sodupoxi.pdf
    • http://files.speculos.ca/uploads/1/3/0/8/130874063/2802249.pdf
    • http://files.mmrcfoundation.org/uploads/1/3/0/7/130738704/xudejonevik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/wukipi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/17970966175.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/zepogikiviwafaraz.pdf
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/76636087469.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/kivavaxokovoluzejitifoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/4514/3207/files/59743324425.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/popopaduxibiwox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/meleginodorijiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/jodifen.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a2f.bin
cd96972a70573a7d956978089e15845fce578d49e74f691b76d3cfb610a49119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2F 5720 bytes
font_01_sfnt_off00006dc3.bin
d8447425b6a56c5152597b3812ddb50c028cfcc5bf38d3fa0637a09785eef53a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC3 10032 bytes

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