Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb783df4f13a0a9…

MALICIOUS

PDF

34.6 KB Created: 2020-08-08 09:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0138bc07009e22c46553de6cc96ab3c2 SHA-1: 624aca4695a486cea54df5d5c8f50cb28f3bed72 SHA-256: 9fb783df4f13a0a9c140dae361c824576acfab80982b470d8b9ca1c90afc24cc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains with numeric slugs, indicative of an SEO spam or link farm tactic. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=catalogo+vimar+plana+2020+pdf', suggesting the primary intent is to redirect users to malicious content. No scripts were extracted from this sample.

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=catalogo+vimar+plana+2020+pdf
    • http://files.clarkpiperepair.com/uploads/1/3/1/4/131407138/39afebec.pdf
    • http://files.wacg.info/uploads/1/3/0/9/130969742/petoxomivowafu.pdf
    • http://files.robroymcfarland.com/uploads/1/3/2/6/132682882/tonomipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/92333208381.pdf
    • https://cdn.shopify.com/s/files/1/0432/4861/5579/files/90933251237.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/86594469220.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/42407886986.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/81979850938.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/6614074004.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/sovivoginijawipesatika.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/84000412481.pdf
    • https://cdn.shopify.com/s/files/1/0435/4975/3507/files/how_do_i_update_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/candide_text.pdf
    • https://cdn.shopify.com/s/files/1/0428/5110/6972/files/21228170554.pdf
    • https://cdn.shopify.com/s/files/1/0428/3885/1751/files/72251941341.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0389/files/fundamentals_of_physical_acoustics_blackstock.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_off000047d8.bin
01fc6fff36d44336307e67fb1117df0b90d1d6aa8d796f40294ca0f779521aa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x47D8 5424 bytes
font_01_sfnt_off00005a3b.bin
d2dc0cbd0fc35fecd59d036d88cba304841bc305c0dd294ab54929844be6e59f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3B 11000 bytes