Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c56070e59043cb…

MALICIOUS

PDF

41.5 KB Created: 2020-08-20 18:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b82414fe51db5fa1feb96dd8cccc004d SHA-1: c7ec62c7df7b85d1e667beb12331e2baf4400905 SHA-256: e9c56070e59043cb74510bd0e6605fcf4f1499efb8207666a6b9bf85af8884df
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=seizures+guidelines+uk'. This URL is presented within the document body, suggesting a social engineering lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=seizures+guidelines+uk
    • http://files.kefinancials.com/uploads/1/3/2/6/132681836/9153339fe35b8a3.pdf
    • http://files.papermagicbook.com/uploads/1/3/2/8/132814136/fedakegetefanel.pdf
    • http://files.westofirelandwomensminimarathon.com/uploads/1/3/0/8/130813701/158c79a858ab57.pdf
    • http://files.soaringhawkvineyards.com/uploads/1/3/0/7/130775633/kalitetuwipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/d_d_5e_new_classes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/46217358614.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/xuxozimitexipuripe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/rogitu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/vipobumawebib.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/55919291229.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/pabirababelu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/jogonebavafofoso.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/60781339376.pdf
    • https://cdn.shopify.com/s/files/1/0437/3289/3857/files/rails_hidden_field_tag.pdf
    • https://cdn.shopify.com/s/files/1/0440/8839/3893/files/95453983416.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/68969261917.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000651c.bin
073ed5f5fdfe661428f7e333596b985071e8bc252aadfca33d3c967c24f7705e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 5000 bytes
font_01_sfnt_off0000762b.bin
bc6e65ff5001e30b2ffae7db3dfe8b0bdebbcc864b77682c18a3816bf06b048a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762B 10244 bytes

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