Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c17b025eb1c3c4…

MALICIOUS

PDF

43.8 KB Created: 2020-09-01 07:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e956cc60a306c46c0106eafe79d0c3d9 SHA-1: 5aac567595d31affd9f090d6a74c41d994d75ddb SHA-256: 22c17b025eb1c3c46b79b4e51dce81bfc8ffdff04a00706459012cd49e8a19da
130 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a free template download. The document also contains a large number of external PDF links, many pointing to static.usrfiles.com, suggesting a link farm or SEO abuse tactic. The presence of a visual download button further supports the lure.

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/wix?keyword=free+template+for+monthly+business+budget
    • https://static.usrfiles.com/ugd/b8c837_9b7f122c35bf4c06913c209b901232f2.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_4970defc9cfd4ff0ad43b6e4d47ac68d.pdf
    • https://static.usrfiles.com/ugd/b8c837_afc8f188e4a548d1bacb7fcad7aeffd4.pdf
    • https://static.usrfiles.com/ugd/a91264_a83c612c861e40268015626a321fbb56.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_456e963ecdd845b391a79329ab74cd86.pdf
    • https://static.usrfiles.com/ugd/b8c837_1aebf2644115421aa3651062f9b44d5f.pdf
    • https://static.usrfiles.com/ugd/10e3af_348f780c85b343fdb0a7719fbcfbde8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0a1acd69a744bdc87d22a4cbe0bff06.pdf
    • https://static.usrfiles.com/ugd/289c5e_edb724ef661e41eeb84da63781be5608.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/21064712428.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/fafujakuwebunugodonupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/dumatadajewitikilovekorew.pdf
    • https://cdn.shopify.com/s/files/1/0451/4296/6426/files/basetuto.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/bofugurepixobizawisafine.pdf
    • https://static.usrfiles.com/ugd/79e0dc_933511f2654f4b148a2bdb13d1b17695.pdf
    • https://static.usrfiles.com/ugd/b8c837_a48fdee1769d4996ab14cc2f69dff205.pdf
    • https://static.usrfiles.com/ugd/80bfa9_dd5397ef482a4c308804cb9271316e20.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97d1b49d85246f88f14ebaee3a5159f.pdf
    • https://static.usrfiles.com/ugd/d5415a_dd624f1f7433450d977d02ea03773219.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/
    • https://cdn.shopify.com/s/files/1/0429/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a1e.bin
b9866fcd3c969d047febd1c8731f5ba3193ade64eb23b02388cecf19a3fce62c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1E 5652 bytes
font_01_sfnt_off00007d33.bin
350925005e310a728395fb961050c227e6eabe918dd48bb3c561fc6d735b9b4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D33 10788 bytes