Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d873654eead76d…

MALICIOUS

PDF

61.4 KB Created: 2020-08-01 23:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91c019e3db9fa28dfdb92dcd1a9b8da0 SHA-1: 3c07413e528af1eb912b2e65d13a5a87c230bc96 SHA-256: 20d873654eead76d32c686cce24ceeef074112b4516d8f5c583c0cbd99770f2e
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=skyrim+manual+pdf'. The document body, though heavily obfuscated, appears to reference 'Skyrim manual pdf', suggesting a lure to trick users into clicking the malicious link. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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=skyrim+manual+pdf
    • http://files.dkpayments.com/uploads/1/3/1/3/131379594/7ae9e703807.pdf
    • http://files.seilafernandezarconada.net/uploads/1/3/1/4/131411596/3572b.pdf
    • http://files.spotlightseniorservicesnorthernarizona.com/uploads/1/3/1/3/131380171/gonokuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/60598419563.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5228/files/25755247426.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/discord_delete_message.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/92796804364.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/kumav.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/kobogupamikulew.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/94829239779.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/22005609345.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/83356874133.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/38198076680.pdf
    • https://cdn.shopify.com/s/files/1/0428/2282/8198/files/konob.pdf
    • https://cdn.shopify.com/s/files/1/0436/5064/6169/files/smokey_robinson_cruisin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/punajugu.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_off0000b235.bin
2539f9733bb753fd36bdd0d8516bfd1aecd1f72bb27d3deff0fef89fe5872127		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB235 5276 bytes
font_01_sfnt_off0000c41e.bin
f9bbb0b5a518ff00e1d211e7916a371090683cf12e82472fbedb4327c533adef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC41E 10940 bytes

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