Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a651b33f1ddbb9e…

MALICIOUS

PDF

44.2 KB Created: 2020-09-01 23:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 612ffad3730364dc3bc0fcb3d6c84e96 SHA-1: b0e0edc665472e7659d6c8225445996eca8bfc64 SHA-256: 4a651b33f1ddbb9e72d960160004afd2c415b28650b198f092593c2917437e46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Internet manager' and includes the malicious URL, suggesting a lure for software piracy or a scam. The presence of a 'Password-protected archive handoff' heuristic indicates a common technique to hide malicious payloads from initial inspection. The numerous links to Shopify and other domains suggest a link farm used for SEO poisoning or distributing malicious content.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.me/wix?keyword=internet++manager+full+kuyhaa
    • https://cdn.shopify.com/s/files/1/0464/3110/9272/files/ranegibevuviwawixupiva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/91238804404.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5382/files/3155181183.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/raduvorulozija.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5902/files/4_bedroom_house_design.pdf
    • https://static.usrfiles.com/ugd/b58d21_5ba4577f838a4fb9963752260b58981d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c31558bff1c4664b5282cef82c857d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1d7f7b7a9fa4410bb39b8d6906269d2.pdf
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/biodata_for_marriage_muslim_boy.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/23584602772.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/76448133329.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/gdpr_compliant_privacy_policy_template_small_business.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_off00006ebe.bin
51c6b80ea83835a8a2f3c57f367a363231ddeab372502e38cde8d9bcb4584a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBE 5104 bytes
font_01_sfnt_off00007ff9.bin
1a67842ba6a6049daba9857c324299e278aadcba6d9225c784df82b9bbdc74ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF9 10608 bytes

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