Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0737831c30e5de6…

MALICIOUS

PDF

55.3 KB Created: 2020-08-21 03:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b0e02276e7ee09fef7a4594f769dbe7 SHA-1: a44a66f82b91fb34167c7ab3d9f68fc395563395 SHA-256: f0737831c30e5de6d4ee2cf446d1edbd9b105b766b8f5aabc774c9ac7a48dc62
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=free+math+worksheets+for+6th+grade+algebra'. This indicates an attempt to lure users to a malicious site under the guise of educational content. The file also contains a large number of embedded URLs, many of which are hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive 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/pify?keyword=free+math+worksheets+for+6th+grade+algebra
    • http://files.enoughcorruption.com/uploads/1/3/0/8/130874575/tobixanunaxowu.pdf
    • http://files.wyaskwellness.com/uploads/1/3/1/4/131408432/c59f80.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/15240815143.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80463449019.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/wanamumagugitopug.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/nursery_and_primary_school_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/25272255210.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/55779599391.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/99481834791.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puliwaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/bovunidojosigil.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_off00008ff3.bin
cdca6f200cd3229b3e6dae23e6ee3fbeb5462ebd0ca403f9120b59fabb4f4a33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF3 5724 bytes
font_01_sfnt_off0000a35c.bin
7ca7a63623b0b7fd08d615317b47e2808d2698617151d3cd4ce4607467c55a58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA35C 14240 bytes

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