Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7ef84da60746fe…

MALICIOUS

PDF

42.7 KB Created: 2020-08-25 04:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4467031962c17eeb3b72e7367218cef SHA-1: 7931a3d4e27a69f84f89e4eeaddab79e7399d033 SHA-256: 2b7ef84da60746fea3ce6b5c3b23a37e64067472b94d851c5cebcaa0d4be876c
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=guidepost+growth+equity+fund+size, which is likely used to redirect the user to a further malicious destination. The document body itself is largely unreadable due to encoding issues, but the presence of the malicious URL and the link farm strongly indicate a phishing or redirection attack.

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.com/pify?keyword=guidepost+growth+equity+fund+size
    • http://xiwepaxiv.sidekick-accounting.com/uploads/1/3/0/9/130969559/gilanezorefidet-tedutewimu.pdf
    • http://sited.tnquarterhorsesales.com.au/uploads/1/3/1/1/131164112/wepabavebot.pdf
    • http://files.designsbydenisea.com/uploads/1/3/0/8/130814466/zuzoref.pdf
    • http://files.newglobalimage.org/uploads/1/3/2/3/132303163/4008708.pdf
    • http://files.marshcreekmini.com/uploads/1/3/1/4/131483219/nijilamuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/bollywood_movies_old.pdf
    • https://cdn.shopify.com/s/files/1/0439/8091/4846/files/89344012694.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/71780730345.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/uninstall_eclipse_mac.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/pemuluxuzilegatut.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/metalocalypse_seson_3.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/harley_davidson_parts_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/pubesewonekegerixijana.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a3b.bin
b2d6f8142141af7ca19f76f6c79ca39191a7eaa7d309594c592dba2fe552cd6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3B 5344 bytes
font_01_sfnt_off00006c80.bin
0458827a217075f473278012bdfbd9757130faf4a5c78d32da1898c3550d6eee
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C80 10376 bytes
font_02_sfnt_off00008fff.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFF 4324 bytes