Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea077bd5ddf434b…

MALICIOUS

PDF

39.7 KB Created: 2020-08-25 05:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec4b92bd7ffa24a38486daa01588f07 SHA-1: 947a3bfcf6d75e96621c38627fcaedfedf341f98 SHA-256: 4ea077bd5ddf434b5012ab657de6a3f7fc14a768f14f353ea3718f1817c1a884
128 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple embedded URLs, including a critical finding of a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=avast+free++filehippo'. The document body also contains this URL and other Shopify links, suggesting a lure to download or access malicious content. The presence of a 'download button' heuristic further supports this attack pattern. No scripts were extracted from this sample.

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=avast+free++filehippo
    • http://files.peerteaching.co.uk/uploads/1/3/0/7/130776629/1c03b67a5d9c706.pdf
    • http://files.harkwell-labels.co.uk/uploads/1/3/1/4/131453429/gekikugepegupe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8966/4926/files/undertaking_annexure_e1_hssc.pdf
    • https://cdn.shopify.com/s/files/1/0435/5463/5937/files/solving_quadratic_equations_gcse.pdf
    • https://cdn.shopify.com/s/files/1/0429/8371/9071/files/12285347658.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/nanafizanuraliluv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/peaky_blinders_streaming_ita.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/don_t_look_back_in_anger_piano_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/fodurajexibaralitudejepaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/67854564561.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/15099485536.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/derobemigimulotov.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6232/files/jizejegozapoxa.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_off00005e9d.bin
74b2a5e35fee244c24da489efadd6b4d86b59232f41fe62cdab80f7b69abbf79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9D 5040 bytes
font_01_sfnt_off00006fb8.bin
738be31d424d2c2a9b2757504b6032f9da3dac6ab02b6f0091a3d3c33e8bcb5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB8 10148 bytes

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