Malicious PDF — malware analysis report

Static analysis result for SHA-256 c418ba08d3f9e863…

MALICIOUS

PDF

38.2 KB Created: 2020-08-30 19:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 971717327290792e8d5b820ea81514c1 SHA-1: ae44339058cddfaa7b12ff5563a52f510086a723 SHA-256: c418ba08d3f9e863911e96c38ff95272dad7a69877af81879a1c015dad281031
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a song title. This is further supported by the 'SE_INVOICE_LURE' heuristic, suggesting a deceptive pretext. The PDF also hosts a large number of external links, many pointing to static.usrfiles.com, which is flagged as a link farm. No scripts were extracted, but the primary malicious activity appears to be redirecting the user to a harmful site via the embedded link.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=evaporation+condensation+precipitation+song
    • https://static.usrfiles.com/ugd/b8c837_a7c462d476e04256a53a9cc320975875.pdf
    • https://static.usrfiles.com/ugd/3f80ec_8b46f902465c488a8d5a1dbf66640a6d.pdf
    • https://static.usrfiles.com/ugd/0f5b72_473266275e1543ff95f6f186f9f6174d.pdf
    • https://static.usrfiles.com/ugd/0cd019_c21410a2c89a40e9b831f348906b6006.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/power_gear_parts_and_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0108/files/zesifil.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/52288919410.pdf
    • https://static.usrfiles.com/ugd/0d089b_863960567f84495886d62ab1a9b38c0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_202350c6c4b54632af88f8da9d74f51a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6095cd605a4b43bca7bb6f59728d8c0f.pdf
    • https://static.usrfiles.com/ugd/1849a1_34dd735351ab4f339653614f69269c8f.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/gajodokanogegik.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/surah_al_kahfi_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/vomoxexafesabutozu.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_off0000573b.bin
bfda9c7bd60946398a9bce33907cab45d85f5a1faf912dfc599322b5ef28721f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573B 5228 bytes
font_01_sfnt_off00006911.bin
49d97d3d27b0c5f3f393042b45bd9df6cf19ec7b02c932d59de9fe99b0742675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6911 10212 bytes

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