Malicious PDF — malware analysis report

Static analysis result for SHA-256 83103057c184dcc2…

MALICIOUS

PDF

45.9 KB Created: 2020-08-09 20:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a1e972856d85f20b3b84d7e82ad423 SHA-1: 4b7724fa7d9cfe26377bca0f0db434d274c2f6dc SHA-256: 83103057c184dcc2afc7cef2a9c2a2f0fd9f0ef57f79ba41954cb724710d4ea4
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as an academic document. The document body and embedded links suggest a lure to a phishing or malware download site. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content.

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.com/pify?keyword=ignou+acknowledgement+slip+for+assignment+pdf
    • http://files.mendedhearts117.org/uploads/1/3/0/7/130739093/bomaxugux.pdf
    • http://vewekuduz.sanfranarc.com/uploads/1/3/1/6/131636612/1f3a5d.pdf
    • http://files.larkandleigh.com/uploads/1/3/1/4/131409508/b636cc9eec4fcc.pdf
    • http://files.davidwestphotography.net/uploads/1/3/1/4/131437330/rizawuxur.pdf
    • http://files.whatsintylerspan.ca/uploads/1/3/1/4/131455475/mogefijami.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9629/files/cpr_latest_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/78209001750.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/virusud.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/lusimiro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/fetal_blood_circulation.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/68815491665.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/49953940494.pdf
    • https://cdn.shopify.com/s/files/1/0434/8071/1325/files/zinidoxevivadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/camping_and_caravanning_club_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0440/0214/8510/files/juniroxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/57436305668.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/sedog.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_off000074b8.bin
0f02e1e48304cc597a591fa573c1eee262002883a55277b8e7e9366052e343e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B8 5568 bytes
font_01_sfnt_off000087b3.bin
49cfba49eab0e4b58aad575b53e6d3faca6b09ead27fcf5365ce0966811caff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B3 10244 bytes

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