Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf00f15125998df…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 11:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c83576c21778b2aff8ce70f83905a6a SHA-1: 658b94c85fe58badc5b1ef17a1dc3a62e07f30e1 SHA-256: ddf00f15125998dfba829817eeed125fe2f61222f22a91032b39ff448466e37e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. The document body, though partially corrupted, contains the same URL and a title related to 'Cuna termica ventajas y desventajas', suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify URLs, but the primary malicious redirector is the critical finding. The file's purpose appears to be redirecting users to malicious infrastructure.

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.com/wix?keyword=cuna+termica+ventajas+y+desventajas
    • https://static.usrfiles.com/ugd/b8c837_7d17c65107c94a03ab9226ef1b37f8e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f15c3c09addf47b0b9c460c2bbf5fc09.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3fe03b5f37441ef8720a6ec74cb2d99.pdf
    • https://static.usrfiles.com/ugd/d4da64_e4bfc7e42c8447f68216cc966469e709.pdf
    • https://cdn.shopify.com/s/files/1/0440/7109/2376/files/49587576421.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/convert_tiff_to_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/gasarovikegisanudifadam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3463/files/bapepidinavijaxalemijipop.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7577/files/git_bash_profile.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/simple_present_tense_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0441/4259/2152/files/55982238980.pdf
    • https://cdn.shopify.com/s/files/1/0462/1448/0026/files/lilawugivumupasaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6642/5497/files/rikivamit.pdf
    • https://cdn.shopify.com/s/files/1/0435/3143/6186/files/nurinusojobukepire.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/50541840681.pdf
    • https://cdn.shopify.com/s/files/1/0438/1101/2765/files/zetamon.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_off00004d18.bin
9930dd40046980ebf7c63bac56bc564688dc07cae2ba4e15e20cf31b40abc59c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D18 5196 bytes
font_01_sfnt_off00005eb2.bin
736a2478fc90b5972215a339adc3f731a4f73b8bc6c74d49c6ded975a8e00c35
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB2 10660 bytes