Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb08c68f4f466d4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 03:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39ee5dd64651799ecebb55c71c4ebf9b SHA-1: 1697a78dd1deb3f7937af34039c9615505648418 SHA-256: 0cb08c68f4f466d4e7347b062b59c006d8d07a4d92a20006b99eaac6522f189b
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, disguised as a 'communication plan template', leads to the `ttraff.cc` domain, a known malicious redirector. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to Shopify domains but one points to a suspicious domain. The ML classifier strongly flagged this PDF as malicious.

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=communication+plan+template+for+change+management
    • http://jusugu.hourglassyouththeatre.com/uploads/1/3/0/9/130969645/jekuwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/oh_baby_when_you_talk_like_that.pdf
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/1277131663.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/gofukakijuke.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/32153870334.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/tapijofobeditamawudu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5884/0223/files/66001700813.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rakapadanixip.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/rabidu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/fakogidizev.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/romixaxe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059d6.bin
2ec7df6526ff5d4dc501a0b3e7389d03fcb280ea3804e4eb95e5665fea04fcc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x59D6 5156 bytes
font_01_sfnt_off00006b30.bin
d21c3a36767fb2ec200882c951a6b84b7c59cea7218a055a65e90f4c5f50d1aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B30 10100 bytes
font_02_sfnt_off00008db3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB3 4324 bytes