Malicious PDF — malware analysis report

Static analysis result for SHA-256 708582c33a8a97b3…

MALICIOUS

PDF

35.7 KB Created: 2020-08-17 17:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a8df45d34aa4eeea9274da305cba48 SHA-1: 546ff023772383e496c3de0cb571dd97c49a1187 SHA-256: 708582c33a8a97b3452c0d4c854fa69dc140b06e23277eba6992980772f88f98
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.ru, disguised as a journal article. The ML classifier strongly indicates maliciousness. The embedded URLs suggest an attempt to drive traffic to malicious infrastructure, 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.ru/pify?keyword=jurnal+anemia+defisiensi+vitamin+b12+pdf
    • http://files.hospicecareteam.org/uploads/1/3/1/6/131606346/todereda.pdf
    • http://files.theflamestillburns.com/uploads/1/3/1/6/131606603/d0d67364e5a0ac.pdf
    • http://nodopa.liatelbling.com/uploads/1/3/1/4/131408027/d57fdddfeb78.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/vesosogopiliruf.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/swot_analysis_journal.pdf
    • https://cdn.shopify.com/s/files/1/0438/1320/8224/files/classical_sociological_theory_craig_calhoun.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/10608708761.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7577/files/poneli.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/sugonobuzogumowunave.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/jubiripuwemulaweve.pdf
    • https://cdn.shopify.com/s/files/1/0434/1337/3084/files/nofajuxovavuzuzot.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/adobe_animate_cc_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0440/7332/0600/files/44922945484.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2392/files/22525553477.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ginowojero.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_off00004de1.bin
c6cb561ca5c0a66cf58510d5db543ba17619a7c9f9afafc5b3f59e73f4ba11a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE1 5560 bytes
font_01_sfnt_off000060b7.bin
2feff306b65b1dacc01af27c6b4d2a1eccf2b330e96dbed0a3ce8ca1bc9dda61
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 9788 bytes