Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ba157b4b08590f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-26 00:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 789eea961e41455d1a51070ffe8af811 SHA-1: d4c66706ceebebeb05501698ba0ceea2ce8a085a SHA-256: 26ba157b4b08590fdfc57e59bbce1f7bff5a4d42332d728a269983798172db0f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'great depression worksheets middle school pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of numerous links, including those hosted on Shopify and other domains, indicates a link farm designed to distribute malicious content.

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/pify?keyword=great+depression+worksheets+middle+school+pdf
    • http://files.lforlupus.com/uploads/1/3/1/3/131379530/8acda8c4982d3f7.pdf
    • http://files.organicskin.net.au/uploads/1/3/1/0/131070845/93e7e3e162db3.pdf
    • http://jazaxop.thepowissettgroup.com/uploads/1/3/1/3/131379685/gefuzokuminarukarof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/revagegijolopivag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/mudimomofosug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/gojukadulefefivofupefopu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8078/files/sunis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/88254211870.pdf
    • https://cdn.shopify.com/s/files/1/0446/1376/3235/files/understanding_canadian_business_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/43158514864.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/weight_loss_diet_chart.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1039/files/aptitude_tricks_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0437/5383/2609/files/64836068392.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/prefix_to_postfix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/38683588810.pdf
    • https://cdn.shopify.com/s/files/1/0436/3619/5488/files/novesilubapedewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/diwurovenusuvij.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/64571764722.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_off000063f0.bin
aff60e0e0526deaa8200493e56c69c818e26e3b0c1c1db6f3c7a7ab6d5579954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F0 5584 bytes
font_01_sfnt_off000076d5.bin
ab0a3ead40e95f6b373a0bdc0c65e47c7a9a1c5c5410affafc836f64ea64d60a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D5 10376 bytes

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