Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b334bbacbe5b210…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 09:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6fb6c4d9c704ba1e78c90a8dcdf241d SHA-1: 207b6519c7c58021bb8d11c8c226560da2182198 SHA-256: 5b334bbacbe5b210f270e61985fb40fac1383b1c7b6f5054a744494c504a4e18
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body also contains this URL, along with a large number of other PDF links, indicating a link farm. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the presence of malicious URLs suggests an attempt to redirect users to a harmful site, likely for phishing or malware delivery.

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=openerp+8++for+windows
    • http://wixelilug.cityofgracemobile.org/uploads/1/3/0/7/130776445/vufibaneve.pdf
    • http://files.at1space.com/uploads/1/3/1/4/131438353/a70d0c9ff2459.pdf
    • http://files.skinboostlab.org/uploads/1/3/1/4/131406592/fewevevazalibo_borenitu_lawurawemus_digakajerarirej.pdf
    • http://telufav.washingtonmidwives.org/uploads/1/3/1/4/131453134/1136413.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/83752496175.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/dexokem.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/bf-_888s_frequencies.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/64942220812.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/jizamagekosofiteris.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/zojojusumirafusom.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/58673921793.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/replace_belt_proform_treadmill.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_off00006b7c.bin
3352e036cd9bca0fc3e90972e7cc6383017191d885a458cabfb4119dfb2143dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7C 5104 bytes
font_01_sfnt_off00007cfc.bin
3953270e8fe2607d59bd48f6b00ba2879e15ffa5153eb8826a014d623dac55fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFC 10400 bytes