Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb57d6fdc43ad152…

MALICIOUS

PDF

39.7 KB Created: 2020-08-29 15:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d50838a6aaaa3c45a9d109b76c5b2fe0 SHA-1: 13c59c729446a8a061ef344b6c52c6d902058ab3 SHA-256: cb57d6fdc43ad152f90a164a560e0484d7c405c43eacbd82ad3c002392feddae
148 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a reference book, likely a lure. The presence of a callback lure heuristic indicates a potential phishing or tech-support scam context. The file also contains a link farm, suggesting SEO poisoning tactics to drive traffic to malicious sites.

Heuristics 5

  • 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
  • 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.com/wix?keyword=asm+metals+reference+book+third+edition
    • https://static.usrfiles.com/ugd/b8c837_149928f1bd4a4ddb87ba87799a200367.pdf
    • https://static.usrfiles.com/ugd/b8c837_73f27eb718514f14964a172096bfde1c.pdf
    • https://static.usrfiles.com/ugd/c1de29_6a8f10671f2146648b767f76bfaa94c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_57ce9fba7b8f487da62bb35dc16ce0a2.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3104/files/super_bluetooth_hacker_1._08.pdf
    • https://static.usrfiles.com/ugd/b8c837_233d63fd43384f64a6583dfb153e8502.pdf
    • https://static.usrfiles.com/ugd/b8c837_893d777f6e184fa09d49e5c38284c2be.pdf
    • https://static.usrfiles.com/ugd/b8c837_10dc3f92d74e4203883738d3d2ffd212.pdf
    • https://static.usrfiles.com/ugd/b8c837_133a095451e74cd9ab17de8f591822b5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e76.bin
23fa987fcc30d52118c3831df0795c6f41a2c1ce0de6c9c8ceed3da1fd1bf41d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E76 5240 bytes
font_01_sfnt_off00006005.bin
73f29e586c4d6a14cd90a38b4af0f8d7fc24ee5d7b3e6b141165a056045380f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6005 10564 bytes
font_02_sfnt_off00008407.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8407 4324 bytes

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