Malicious PDF — malware analysis report

Static analysis result for SHA-256 49751b6d2423c0e6…

MALICIOUS

PDF

44.7 KB Created: 2020-08-19 03:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 424151c48b29215a456fe65927294855 SHA-1: 6f359bdb48516462ba5e68b7e440b3db4a5c503f SHA-256: 49751b6d2423c0e651a36b8ab22bf8b87ae73a80c67349b83600c39ffc82b984
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to `ttraff.ru`. The document body, though partially corrupted, contains text related to 'free educational games' and a URL that matches the redirector. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to `cdn.shopify.com` but also include other potentially malicious domains. The primary malicious URL is `https://ttraff.ru/pify?keyword=free+educational+games++for+kids-+full+version`, which is likely used to redirect users to a malicious payload.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+educational+games++for+kids-+full+version
    • http://fefufabob.paleolovecompany.com/uploads/1/3/2/6/132696323/13140b3a62ae3.pdf
    • http://files.saragayart.com/uploads/1/3/0/7/130776619/xiguzivef_makavaxumo_detemazit_megovutiwipe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/87609315067.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/debituwovuro.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/aluminium_thermal_properties.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/13367594423.pdf
    • https://cdn.shopify.com/s/files/1/0431/7236/4437/files/tigixas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0855/6182/files/98495336696.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/manuxuwetesupasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/bakekiwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/59953169317.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/21961455270.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1407/files/bapufevulifen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/85531784162.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_off00006f49.bin
fe1c4c6d67a87d5c6d30565383074fb4c774bcda255d3d7c4a727a5a51a05810
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F49 5452 bytes
font_01_sfnt_off000081cb.bin
bf619d468bf71e6a208507ad75d247085320d9c186d3ff1b123194eccacd490c
pdf-font-stream PDF embedded font (sfnt) at offset 0x81CB 10580 bytes