Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6c4628bc49ff48…

MALICIOUS

PDF

56.8 KB Created: 2020-08-18 23:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a58ca4409e1aa67586ab30248da55863 SHA-1: b123a8c1d6a722e80c8dd703024cf95290ace25a SHA-256: 8a6c4628bc49ff4836852762ba8f50f5be7201e86790dd96bd104cb9ad88f0d5
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link pointing to a URL that includes 'medicare+safety+net+refund+form', suggesting a phishing lure. It also features a large number of embedded PDF links, many hosted on Shopify, likely for SEO manipulation or to obscure the final malicious destination. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the phishing attempt.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=medicare+safety+net+refund+form
    • http://files.shopacr.org/uploads/1/3/1/8/131856276/jiriposeviri.pdf
    • http://lebovu.mcwoodturnings.com/uploads/1/3/1/3/131380550/9233931.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/93153926668.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/rirasomibabuboto.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/17498235629.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/17655307828.pdf
    • https://cdn.shopify.com/s/files/1/0436/9098/3574/files/avast_mobile_security_premium_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/94711161573.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1454/files/sobujofipajubetolenup.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/viwuweretevokamexa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4634/5640/files/pezipekuzis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/8054440511.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_off0000a048.bin
7a1cdab8714dd673e1e448d24d4bc47695cec056f687ac6632e280d3a0afcb51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA048 5244 bytes
font_01_sfnt_off0000b20a.bin
7b089fd57e05a2a4efdd0db8c2ef4817bb71565b77d69d8f3f2b061a799ec10b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB20A 10556 bytes

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