Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c083ce88e666c8…

MALICIOUS

PDF

44.1 KB Created: 2020-08-25 01:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2087ab83bc299d7758b945e89e0df28f SHA-1: d2d49e7f1ea6df68d32eac91467ff862690fdc81 SHA-256: 29c083ce88e666c88307e618bbf61d3900f66fcb22a350e0650362534ea607d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.com, which is presented as a 'Kaizen process template'. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link within the document.

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=kaizen+process+template
    • http://files.craigrichards.ca/uploads/1/3/1/4/131483154/bukuz_vewek.pdf
    • http://mirinimuj.sagehairstudioreno.com/uploads/1/3/0/8/130813612/4875615.pdf
    • http://files.zhugenyang.com/uploads/1/3/1/6/131637553/nuporisaja-fekusobezabezu.pdf
    • http://punenonej.tradergreat.net/uploads/1/3/1/0/131070872/lesoxojarokake.pdf
    • https://cdn.shopify.com/s/files/1/0433/6317/2502/files/visual_studio_code_format_javascript_shortcut.pdf
    • https://cdn.shopify.com/s/files/1/0428/4026/0775/files/lanepumivejekikulimu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83971047952.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/merge_sort_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/apologize_one_republic_partition_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7542/files/definition_of_family_structure.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/11066289457.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0050/files/the_broken_circle_breakdown_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/54517063790.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.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_off00006f94.bin
f95f640cc6aa6ad4627682d2493a0aed2dcd806654f77b723b6ccf7d04eca590
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F94 5100 bytes
font_01_sfnt_off000080de.bin
cca2296a38d6dd3ea2f243b0de6a94bad8873bf74005000ef098320f1491436e
pdf-font-stream PDF embedded font (sfnt) at offset 0x80DE 10288 bytes