Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0a006256214382…

MALICIOUS

PDF

44.5 KB Created: 2020-08-13 18:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3062a88c323bc5fe30699d0a97d5b259 SHA-1: fa12cf5584f1eba1f78291b12d153db9d3e5e390 SHA-256: 0c0a006256214382f79a7876854ff7b5e72db5b1a0c9ec1dfc35bbd83d077b86
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous URLs, many pointing to Shopify, likely for SEO manipulation. One critical heuristic indicates a redirector link to 'ttraff.cc' which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting an attempt to lure users to download or view content hosted on malicious sites under the guise of educational material.

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/wb?keyword=formulas%20of%20physics%20class%2011%20and%2012%20pdf
    • http://files.fgfvegan.com/uploads/1/3/1/4/131453588/5de7d01bb.pdf
    • http://lavavi.theknightshall.com/uploads/1/3/0/8/130814328/fapojazefep-daxos-rujome-kebaxomav.pdf
    • http://files.concreteheritagemuseum.org/uploads/1/3/0/7/130739974/junener.pdf
    • http://files.aphers.org/uploads/1/3/0/9/130969083/wavorizoxepumogak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/61354162550.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/31109016458.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamefidijuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/gasaxeke.pdf
    • https://cdn.shopify.com/s/files/1/0430/4109/5834/files/36757903771.pdf
    • https://cdn.shopify.com/s/files/1/0434/1914/0253/files/fisojozororolezinimeso.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/10384307058.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/feb_2020_calendar_kalnirnay.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/60418268634.pdf
    • https://cdn.shopify.com/s/files/1/0435/8183/3379/files/74312391315.pdf
    • https://cdn.shopify.com/s/files/1/0439/5037/5070/files/bovevujisakazitedebonib.pdf
    • https://cdn.shopify.com/s/files/1/0439/0453/2648/files/86967179137.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33540287451.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/zupejiwixegegimodesosif.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_off00006e2e.bin
78738ab36eef23cedf15edbbd8702bdde25d3e913f9aa9f3ae39355c7a0bb14f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 5636 bytes
font_01_sfnt_off00008140.bin
ba2f595324bcd437f334e455dfda0c6f3f1dc22919b0bec913aa020039dc3d26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8140 10572 bytes

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