Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cba1fffaa90b5d…

MALICIOUS

PDF

67.3 KB Created: 2020-08-29 09:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56ab8c877edfef4bd0a5092e3034a14b SHA-1: a705ce44b1514abbbbcb815793555bcfb553315d SHA-256: f5cba1fffaa90b5d8be71ffc07214c061f8e776a235fee5d148bf839dd854345
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=placenta+accreta+attached+to+bladder'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. The file also exhibits characteristics of a PDF link farm, with numerous external links, further supporting the malicious intent of driving traffic to external resources.

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.cc/wix?keyword=placenta+accreta+attached+to+bladder
    • https://static.usrfiles.com/ugd/b8c837_96ae42056e82436bb8ae0dacb5c22096.pdf
    • https://static.usrfiles.com/ugd/b8c837_517b4ec932634a7c88d540facb71d5c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0178780341434a749fb36962dd2e172c.pdf
    • https://static.usrfiles.com/ugd/b8c837_94b6e7b7877a4fb9977ce7ff51b6be79.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/non_probability_sampling_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/pewemonepaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/bermuda_triangle_book_in_gujarati_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/dexemukuluk.pdf
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/23425614430.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/lubuvalinogibipe.pdf
    • https://cdn.shopify.com/s/files/1/0447/8880/9889/files/psychological_causes_of_stress.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9095/files/27534259316.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_off0000c9ef.bin
498985dbdac2764843ac5bdeb28860dcb486bc62b5562dcba4b14f5e65e62a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EF 4988 bytes
font_01_sfnt_off0000dac9.bin
35ff6f5ef0e3667c75f7ec5db5ba2fb6a892703a17842c344f0b50ec2cf92b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC9 10948 bytes

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