Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a66a3706c9d5c82…

MALICIOUS

PDF

43.3 KB Created: 2020-08-13 02:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 780522321dce84adea7ea25566ed2d67 SHA-1: 3c4a242475f1ad5b5e22bdaedba1002e2ec6e69b SHA-256: 8a66a3706c9d5c82172c10de277fcc03ab968a231525aeea4753a5330c066e71
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=smoothie+recipes+pdf+south+africa'. This indicates the document's primary purpose is to lure users to a potentially harmful site. Additionally, a heuristic for a PDF link farm was triggered, with 30 external PDF links embedded, suggesting a broad attempt at SEO manipulation or distributing multiple malicious payloads. No scripts were extracted, but the presence of numerous embedded URLs, including the malicious redirector, strongly suggests a phishing or malware delivery attempt.

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=smoothie+recipes+pdf+south+africa
    • http://walobega.flipflopgymkids.com/uploads/1/3/1/4/131453698/40320a.pdf
    • http://jeredopuw.yogafromthehart.com/uploads/1/3/0/7/130776716/1257155.pdf
    • http://files.theemptyhandbag.com/uploads/1/3/1/8/131856271/dojerupobiru.pdf
    • https://cdn.shopify.com/s/files/1/0433/4967/2091/files/caterpillar_3516_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/texumuwotaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/the_complete_dlab_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/lobeg.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/58525746591.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/debudisemixobodabadew.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9623/files/tilikexotulekepelowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96258555683.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/87764763303.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/unity_movement_script.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/tozutuvik.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/15213252454.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/business_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1247/files/business_management_and_administration_textbook.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_off00006a2e.bin
ab1a9c200269c80962f79fdccc44c3cb6e9794cc35c1933cdad49a892390f053
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2E 5464 bytes
font_01_sfnt_off00007c94.bin
eb49b114dd909c1253b2e7b84b38b0920cef0716605a9feea87ad1c570f2ef64
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C94 10900 bytes