Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05db5d91a1222e1…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 17:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83f5f488b74eaa49d29e63cae5201832 SHA-1: 9f5d1156871e58a08cdc35e2f42e989b49095f96 SHA-256: b05db5d91a1222e11d81f82634ce284c11ae77965441068fffb0b86d7bd426bc
128 Risk Score

Malware Insights

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

The PDF document contains a link farm and a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=aimersoft+dvd+copy, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to 'aimersoft dvd copy' and appears to be a lure to encourage clicks on the embedded links.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=aimersoft+dvd+copy
    • http://files.valleyofthedunes.com/uploads/1/3/0/8/130814967/goluxajiz_vulaga_vewowuvuweger_somofivurag.pdf
    • http://xifadefin.cascadegriffs.com/uploads/1/3/0/8/130814328/winox.pdf
    • http://files.shardenfreude.com/uploads/1/3/1/3/131383493/xajiw_vogubukixug_riwojekezigek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/atlanta_bread_company_catering_menu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/fovegunaparodugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0997/4169/files/hammerhead_go_kart_parts.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/puzoxezivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/9946870659.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/vezopisukuku.pdf
    • https://cdn.shopify.com/s/files/1/0433/3076/4968/files/gilakiwelaropimepon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/kaduwedokatigelalososuwej.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/buddha_charitra_in_marathi.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_off00006053.bin
6d8ba12e173c1bbd71df1121aa42538381375c8a5319c38b41bae77caf8308b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 5208 bytes
font_01_sfnt_off00007203.bin
002be679a58f0386ff58436abc3767a44e91a7eb80c0878f753d14781bd383a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7203 10684 bytes

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