Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5b3a7cd365ae7b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-02 16:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3de42a9bcde9c6d604dd9b9376fd819a SHA-1: cf661cc545fb48cf525177fa40cbf23a71bbafe0 SHA-256: 4f5b3a7cd365ae7b555cf604e3d47f57f3677c413c916ebecaae81d314c1c547
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body and PDF facts reveal a large link farm, with many links pointing to Shopify domains, likely as a means to host malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=stardew+valley+lucky+lunch, which is used to redirect to other potentially malicious resources. No scripts were extracted, but the extensive use of redirectors suggests a delivery mechanism for further malicious payloads.

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=stardew+valley+lucky+lunch
    • http://files.hampshire-oceana-hypnotherapy.com/uploads/1/3/1/4/131437056/7334995.pdf
    • http://files.capecodgypsea.com/uploads/1/3/1/4/131438708/taxipatuge_solazevimexuwi.pdf
    • http://files.rockandrosh.com/uploads/1/3/1/4/131437484/labovawexa-wipuzevowodage-votaporazaluna.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/javepadan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/48124877347.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/39842347798.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/wesonuzojodufinigebonid.pdf
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/nj_business_registration.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83300066175.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/wiwijof.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/jivapomepuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/gungeon_sunlight_javelin.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/jogepevipupelaxosonoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/82752576801.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_off0000649f.bin
94e40faaa1511c40ec437483d30873b797a20495ac4bad7976da56157e132869
pdf-font-stream PDF embedded font (sfnt) at offset 0x649F 5272 bytes
font_01_sfnt_off000076a1.bin
a990166dedc6d6645c58709c34c1d84ad8bcf31cf8ab393d524bfc364c6e60ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A1 10308 bytes