Malicious PDF — malware analysis report

Static analysis result for SHA-256 554b1d46e3a6bff5…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 07:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 526f1c2c5cfb63da0775df33550d24bc SHA-1: de67e9b9099790b528692d7334efd753ddd6eeca SHA-256: 554b1d46e3a6bff54eb6fab0b8bc93d3ce6542f5dbe1ab70f9f4ff6f1fdc6460
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=psychology+case+study+examples+pdf', which is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, some of which are hosted on Shopify. The primary malicious URL is likely intended to redirect the user to a harmful site.

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=psychology+case+study+examples+pdf
    • http://mimamazo.fortunatierra.com/uploads/1/3/0/8/130874359/aa043d6bf9a95a5.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/xenedigexemesajogawepuj.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/adjectives_to_describe_a_person_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/zevifemoramamesade.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1501/files/fafeluzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/30286996488.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/verbal_ability_test_papers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/wolaguge.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/9434106646.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17524121831.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/lukiw.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_off00006182.bin
55e1a76804ed45c4e843ed0f70b557594c7eac698f03e8d997c32db41daf370b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 5644 bytes
font_01_sfnt_off000074a6.bin
0c1e0a5dcc04eaccf888ea0bf4534270f5a0a08a39d6d925b282ee18eb57574f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A6 10348 bytes

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