Malicious PDF — malware analysis report

Static analysis result for SHA-256 15887e457700cf01…

MALICIOUS

PDF

41.7 KB Created: 2020-08-03 07:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1df1f71c926aace69e925fca3421f546 SHA-1: 0fb3c3f8f6302f8676d0eda9247aff413a02446c SHA-256: 15887e457700cf014c4f908c09337aaf1fc59a6e32bbbf4bfe8faf9ea2dda455
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body also contains numerous links to PDFs hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=credit+card+authorization+form+template
    • http://files.paigeeverson.com/uploads/1/3/2/7/132740362/20b58b5573b.pdf
    • http://files.hawaiihomeschoolnetwork.com/uploads/1/3/1/8/131856353/sudazo.pdf
    • http://files.creativeresourcesinc.net/uploads/1/3/0/9/130969352/toxemadipim.pdf
    • http://muwizajuf.petesenoffphotographics.com/uploads/1/3/0/8/130813509/4563294833533a.pdf
    • http://files.landseasurveys.com/uploads/1/3/0/7/130739369/dixezesakete.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6524/4832/files/21302404271.pdf
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/51556814605.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/rifenebamules.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/porikijepewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/xugagof.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/10938756446.pdf
    • https://cdn.shopify.com/s/files/1/0431/3903/9388/files/wilcom_embroidery_studio.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/ruwona.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/49327604681.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/potewopisadik.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/tsp_form_70.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_off0000647c.bin
db339f87fadcda0681422c04405d90512c719e6686e5cf099d9cd015cc8cb0a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x647C 5172 bytes
font_01_sfnt_off000075ee.bin
6de86c9bba1057678d3830f07123857bfc9c9699c9ecd75fbf5dd9cadbd384ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x75EE 10564 bytes