Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a8707d64141420…

MALICIOUS

PDF

52.9 KB Created: 2020-08-29 07:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4386ed34b2cbc6c78665fb19bff5e84d SHA-1: 1bc14cf73237b263c3ddb0785ba07de9ae14a139 SHA-256: b7a8707d6414142028857688979e304ab3f043a5095f0644624d2f0416ac6446
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector infrastructure. The document body, though heavily obfuscated, includes the URL that triggers the malicious redirect. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted, and the PDF structure itself is the vector for the malicious link.

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/wix?keyword=mito+de+edipo+rey+completo+pdf
    • https://static.usrfiles.com/ugd/b8c837_11aa4c9333a142c0af0c7741f0e27970.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bfbce9e99b9418aa57e31d4dbabc5c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_995ed97ac957410eb0a5da2a3520aa9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_03d0bd130f4f4405a07e7d195c5404c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b48c706326740b9a00ace5824efd83d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c8b5291c90d4cd3ae4ba29955c5d416.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b0858a8111249ca9bf11a06f1dafa58.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8720849d8cc43cc9628223bf32455db.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51eb82ffb154d6ea71517379899237c.pdf
    • https://cdn.shopify.com/s/files/1/0446/6619/2035/files/71761663967.pdf
    • https://cdn.shopify.com/s/files/1/0440/2210/4229/files/72241917829.pdf
    • https://cdn.shopify.com/s/files/1/0447/9533/0717/files/photoshop_trial_bypass.pdf
    • https://cdn.shopify.com/s/files/1/0434/0701/6103/files/golf_gift_certificate_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.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_off00008b58.bin
025ec8e0bf971195a1e8b5c456882339ff4e8c5fad7cbffada45352790c64d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B58 5020 bytes
font_01_sfnt_off00009c69.bin
bf9d5e1b57b05fe243394637fb3b74a2701bdc0a0a562268024cac282df9b281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C69 12680 bytes

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