Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34dde3bed242875…

MALICIOUS

PDF

33.6 KB Created: 2020-08-12 02:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b243cd2f93a0cb632aeb43749fdfffab SHA-1: d87b18a4a7d82de53271a8edfbdd683481fc0c5a SHA-256: e34dde3bed2428754385da3a49b306af8b0adb73d9c37dbc547ae94a9e248307
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One prominent link redirects to a known malicious redirector at 'ttraff.ru'. This suggests the document is designed to drive traffic to malicious sites, likely for phishing or malware distribution. No scripts were extracted, and the document body is largely unreadable binary data, but the presence of the malicious redirector is a strong indicator.

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=handbook+of+avian+anatomy+nomina+anatomica+avium+pdf
    • http://lubar.littletoncrabappletrail.org/uploads/1/3/0/9/130969352/xuzafadudatizami.pdf
    • http://noxat.devitawellnessnow.com/uploads/1/3/0/7/130775162/3128048.pdf
    • http://files.searchlc.com/uploads/1/3/2/6/132683260/2872169.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1592/files/63275586229.pdf
    • https://cdn.shopify.com/s/files/1/0435/7393/6291/files/carrier_ethernet_basics.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/60751033141.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/peptic_ulcer_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/zizuzufin.pdf
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/4186461270.pdf
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/nakakipol.pdf
    • https://cdn.shopify.com/s/files/1/0435/5974/7745/files/39360278735.pdf
    • https://cdn.shopify.com/s/files/1/0432/9291/7924/files/xikigupivajafobodatowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/43420270777.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/32579876936.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_off0000463a.bin
0fa6aab9ff522342e7444dd44aa77b1fa3b47d44d489c9c33da80f755225fc46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x463A 5324 bytes
font_01_sfnt_off0000584f.bin
1c50653a733881e2965e8f3e564352467cb02f4110f3c80a27b15ce25694b697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584F 9764 bytes

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