Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ee003493dd6f10…

MALICIOUS

PDF

51.1 KB Created: 2020-08-28 06:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c927b33f53aad9f3ec3b329746ab4267 SHA-1: d68d099e10373f7bbbcea78213cd1b6965ae66dd SHA-256: e8ee003493dd6f104dd648e55c5bfafb579d87a44cc82fad54d0930d7d177405
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=unitekno+703+manual'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The ML classifier also strongly indicated maliciousness. The document appears to be a link farm, with many external PDF links, likely for SEO manipulation or to host further 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=unitekno+703+manual
    • http://files.imaginetheatre.co.nz/uploads/1/3/1/0/131070702/8c225c0.pdf
    • http://files.backnbalance.org/uploads/1/3/1/3/131398308/galatekapigi-jizigevusar-fugoxudefaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/roblox_filtering_enabled.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/cause_and_effect_relationship.pdf
    • https://cdn.shopify.com/s/files/1/0437/3656/3866/files/dr_miami_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/73541181426.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/tokusokijumalozox.pdf
    • https://cdn.shopify.com/s/files/1/0428/6152/7206/files/29008806511.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/zoxidibovix.pdf
    • https://cdn.shopify.com/s/files/1/0465/3108/4438/files/african_love_poems_and_proverbs.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/75861343381.pdf
    • https://cdn.shopify.com/s/files/1/0428/4956/6886/files/41962442599.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1641/3607/files/tigevosev.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/74099427541.pdf
    • https://cdn.shopify.com/s/files/1/0434/2952/7719/files/20467543097.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_off00008b87.bin
ae5800c6a8a6a4ea3832f16949779acc9845798f4c2019790ee32b04f0f7a3ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B87 4996 bytes
font_01_sfnt_off00009c83.bin
92bfb69c506f195ce89d0b41ab0191b6e91af7408c0dadbdba939314032ccbef
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C83 10096 bytes