Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c05a10fb66f4e9…

MALICIOUS

PDF

44.9 KB Created: 2020-08-14 21:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59668cf621c1c331265a8b659d9d8908 SHA-1: 7bfd34d2b358557d5d043587c13492fade1dd314 SHA-256: 96c05a10fb66f4e9b4cb9d15d56111cbbe26da1ff26db40f7c700486c1c3db7a
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 'ttraff.com'. Additionally, it exhibits a PDF link farm, with many links pointing to Shopify domains, likely for SEO poisoning or to obscure the malicious redirector. The document body contains the URL 'https://ttraff.com/pify?keyword=biostar+g41d3c+manual', which is the primary indicator of malicious intent. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify this as a malicious document.

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.com/pify?keyword=biostar+g41d3c+manual
    • http://files.strengthsdevelopment.com/uploads/1/3/1/3/131398008/wubobubit_bomewabivoj.pdf
    • http://files.tikicab.com/uploads/1/3/0/9/130968933/8194e8aaa285d.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/welixosopajomubugow.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/44266671748.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/weburonoribexanenepejuvu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/44986626870.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/23083528236.pdf
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/zikewasezebumugepum.pdf
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/linear_algebra_examples_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/rosub.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/12560731657.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/19043494750.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/zotojodasowaset.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/78322813900.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_off00006533.bin
19418bb0aee3217cb4ea5fff78a86df05e75e63e2e9449d4e341712c7b63a1ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 5612 bytes
font_01_sfnt_off0000783a.bin
df030c4344e4c53ab0153fdf6f3ae31702f0070348adcfdc774e0f52c2ca4bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783A 15416 bytes

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