Malicious PDF — malware analysis report

Static analysis result for SHA-256 6589a21da3ed6160…

MALICIOUS

PDF

43.9 KB Created: 2020-08-07 13:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57eed6d362f6c38feff1ba1dc3e7bf2f SHA-1: 18e2f1a15743f76f6aa2728cab36d9d0ea9c8aef SHA-256: 6589a21da3ed616029434a269474c65bd1233fbd40325031a6ed1c4d9b3182e7
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary URL, https://ttraff.ru/pify?keyword=asthma+action+plan+pdf+pediatric, is flagged as a redirector, suggesting an attempt to lead users to malicious content. The presence of a 'Download' button lure further supports a deceptive workflow. No scripts were extracted, but the link farm nature and redirector heuristic strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=asthma+action+plan+pdf+pediatric
    • http://files.izenbergs.net/uploads/1/3/1/0/131070212/b588cce2.pdf
    • http://files.infantswimoviedo.com/uploads/1/3/0/7/130739684/6ea116b0c10.pdf
    • http://pusiniwij.lewisgreatdanes.com/uploads/1/3/1/0/131070450/8711824.pdf
    • http://files.sdrm.shop/uploads/1/3/0/7/130739809/7638706.pdf
    • http://nitetenus.truemedicine.ca/uploads/1/3/1/4/131453850/df67cb3936e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/joneginodiketotuzusasem.pdf
    • https://cdn.shopify.com/s/files/1/0434/4591/1709/files/53584727524.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/77642850616.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/75786903586.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/wusatexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/sedix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofes.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2517/files/33805121855.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/65829950567.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/mubovanawisiwujotipipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17810153535.pdf
    • https://cdn.shopify.com/s/files/1/0439/5424/1694/files/dakazilexufarabef.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_off00006dfa.bin
689cece42f44486286bc45932e4c233834d5f83e359ab720a221aede8cc3b95f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 5384 bytes
font_01_sfnt_off0000801e.bin
4a36db937b06b454034aa27d73b3badc8aeb3101447b1e6cda5d624208f49f0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801E 10144 bytes

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