Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc555a96cd90ea35…

MALICIOUS

PDF

40.5 KB Created: 2020-08-18 23:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc663c755a7eff9c213e2f058b317aa5 SHA-1: 38187db4ff0a851b1e48f793fb8a6b14114bdb21 SHA-256: bc555a96cd90ea350b2d1f900ad117f8722506ff1f27f50e15262464a8fc52fc
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking it. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=boyfriend+application+form+word
    • http://files.geyserlandcatclub.co.nz/uploads/1/3/1/6/131606256/3453861.pdf
    • https://cdn.shopify.com/s/files/1/0433/4095/5803/files/16246714809.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/31267163322.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/glossaire_de_l_agriculture_anglais_franais.pdf
    • https://cdn.shopify.com/s/files/1/0428/5697/2455/files/92522768106.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3703/files/blank_partition_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/cemented_tungsten_carbides_production_properties_and_testing.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdf
    • https://cdn.shopify.com/s/files/1/0435/5214/5560/files/42597014870.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/solidworks_tutorial_13.pdf
    • https://cdn.shopify.com/s/files/1/0445/6411/9716/files/casio_privia_px-_160_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/53332621202.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/jesaxopelubawafukadu.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006249.bin
e86922f0f43f9e51a132cfdc9f81cf73c0707ed9cdab45ad38cd09fb3cbbc655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 5368 bytes
font_01_sfnt_off00007486.bin
1756faea7b29dd07a29cd1f29e560df258a9f8d18d1be13336097e2fff141d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7486 9500 bytes

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