Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f16ca8ae60d9d0b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-04 13:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89195498d82b39ef595b4b6214c04129 SHA-1: 7d8edc4a3f9acd8112961753111ffb39ec335e27 SHA-256: 4f16ca8ae60d9d0b8037d1c5e140134f0eb57731eb3eec0c82714228c53a0287
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=plataformas+de+almacenamiento+virtual+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify and various file hosting domains, suggesting a coordinated effort to distribute content or manipulate search engine results. No scripts were extracted, but the sheer volume of outbound links points to a malicious intent, likely for SEO spam or to lead users to further malicious sites.

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=plataformas+de+almacenamiento+virtual+pdf
    • http://files.hangarmom.com/uploads/1/3/0/7/130776489/tigulomo_bikonexepevobu_sugikub_seripoverome.pdf
    • http://files.machine-analytics.com/uploads/1/3/1/4/131452740/tidijivagi_gilasiku_kamujuvujo.pdf
    • http://files.ethelbustamante.net/uploads/1/3/1/4/131406356/7012749.pdf
    • http://files.lekeapena.com/uploads/1/3/1/6/131637211/1689983.pdf
    • http://files.ryanleekk.com/uploads/1/3/1/4/131406701/14cd33f73fc3195.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/46951129673.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/tilifugasenufavirije.pdf
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/life_application_study_bible_nlt_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/gavelelipugagelixebaro.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8836/files/academia_4xx_af_fragments.pdf
    • https://cdn.shopify.com/s/files/1/0433/6215/6702/files/libilure.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/2782388081.pdf
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/52218997725.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/31306212794.pdf
    • https://cdn.shopify.com/s/files/1/0430/0544/4259/files/pawarefefavuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/c_linked_list_class.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0047/files/towukoresekijopoko.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9401/files/28749516147.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_off00006d14.bin
f17d93205ed0c2c6479910048a6cab633edd3b59345a2d50d940023d7ec7be23
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D14 5364 bytes
font_01_sfnt_off00007f4b.bin
35ccb921ac07c81364a767d5d912893de7cbe536a52ca8f80776ae8d7850564b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4B 11140 bytes