Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf65bc4a5a8ac5b8…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 08:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d0a5eccc5e50251b2bed0c5b9a06b6f SHA-1: e66cb2d7f891d4e2f59a5916f371080fcd0a0f07 SHA-256: cf65bc4a5a8ac5b8bc9a8a37cf7ec9b3e9f287b20d3414e6442570529bc56afc
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection attempt. The presence of a 'download button' heuristic further supports the lure of clicking a link. The primary malicious URL identified is ttraff.ru, which is known to host redirectors.

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.
  • 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
  • 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=video+er+for+pc+filehippo
    • http://xekib.boudoirbyadrianaroquephotography.com/uploads/1/3/0/8/130814328/f9d0c39b4531.pdf
    • http://gevejovo.peakperformancefitnesstx.com/uploads/1/3/1/4/131453850/6438542.pdf
    • http://files.alpsed.org/uploads/1/3/2/8/132815388/ledivusawete.pdf
    • http://files.minnesotansagainstpuppymills.com/uploads/1/3/1/6/131606798/nalewil-retumi.pdf
    • http://kevitap.susansimons.com/uploads/1/3/0/9/130969077/ganejizivewesi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/annabac_francais.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98908457197.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/vawaxusire.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/nudagojodipevoxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/73732886814.pdf
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/12174438617.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/64021804058.pdf
    • https://cdn.shopify.com/s/files/1/0453/9131/5112/files/74167359461.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/gegorotedabidakaf.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_off00006771.bin
80eec76618797f9af562aebb3f65a0ff87aab3242da772221b436f3a699ecec2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6771 4820 bytes
font_01_sfnt_off000077ca.bin
dd2fd25ca9cb226bb0506ca86184e6274a67e6b875b837627cd18dd28816c1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CA 9896 bytes

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