Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5db7534dcf5f6d1…

MALICIOUS

PDF

49.0 KB Created: 2020-08-05 04:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76da6bb7e81d8fe13dc9a699c7510489 SHA-1: 31a62fed826af1177bbf05355fb49f4f2f16fc1b SHA-256: c5db7534dcf5f6d1ba234a3db4fe27b2310d64fff2eb91ab2abcb27069466187
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.cc/pify?keyword=que+es+el+sistema+capitalista+pdf. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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=que+es+el+sistema+capitalista+pdf
    • http://files.annieontheemeraldcoast.com/uploads/1/3/2/3/132303075/rotojitusodi.pdf
    • http://files.sonsofitalycgc.org/uploads/1/3/1/0/131070751/lejos.pdf
    • http://files.abfcreativedesigns.com/uploads/1/3/1/6/131607029/tetudelikotegus.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/brooklyn_heights_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/17653882154.pdf
    • https://cdn.shopify.com/s/files/1/0433/7428/0855/files/10781986348.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/vaxemigugelujejop.pdf
    • https://cdn.shopify.com/s/files/1/0432/2105/7700/files/55689363158.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/zepisenam.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/fonijorow.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/crompton_ceiling_fan_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/37173000680.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdf
    • https://cdn.shopify.com/s/files/1/0436/2731/5353/files/84504013272.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_off00007f4a.bin
f15989af696f29fdc5256c4cbd50229fa260b38e22e11e35c6479bb9c0342f98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4A 5268 bytes
font_01_sfnt_off00009123.bin
c111e0e828a1d97284ff0f32bc20f24c6665227981799b6dd85bbaaf32bfec33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9123 11224 bytes

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