Malicious PDF — malware analysis report

Static analysis result for SHA-256 313e8152331ca6ee…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 11:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfd105d3b0ef80d8dbe641908e68096b SHA-1: 4462200cbf671ffe653df2348983a9a1bcf790fa SHA-256: 313e8152331ca6eeb58fb005a895a04560e24d761f2585b42a594acb01650a5d
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a download link for 'gta vice city cracked apk free download'. The file also contains a mass external PDF link farm, with many links pointing to static.usrfiles.com. The presence of a visual download button lure further supports the malicious intent.

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=gta+vice+city+cracked+apk+free+download
    • https://static.usrfiles.com/ugd/3eed2b_0c06384caca544e4bfbdfbc9e4b93637.pdf
    • https://static.usrfiles.com/ugd/72b0e7_77351ab41a154d438107f3b28c4cc05a.pdf
    • https://static.usrfiles.com/ugd/9e41f0_6f224a11a3a74ea3b18a66a2d293090d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57896919986.pdf
    • https://cdn.shopify.com/s/files/1/0434/4260/2140/files/musica_joao_e_maria_chico_buarque.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/clasificacion_de_los_seres_vivos_primaria.pdf
    • https://static.usrfiles.com/ugd/b8c837_9109b88c05074a64ba9531a98d372619.pdf
    • https://static.usrfiles.com/ugd/b8c837_86d9ae27a821481aa156e7006b923e4a.pdf
    • https://static.usrfiles.com/ugd/3826db_b2f188e45a6a480a897b6cc58d1b8f03.pdf
    • https://static.usrfiles.com/ugd/9b5f63_8ad31f76fb6b43e49fa6f44b10666cb4.pdf
    • https://static.usrfiles.com/ugd/b8c837_18fb4f5e52114b188df1b35651c42c50.pdf
    • https://static.usrfiles.com/ugd/b8c837_f244d413efbd4490a8a22d3cdf270720.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_off00006477.bin
459403423d30620b59b38b21394317ba40d3dd9ed8b4eca675affdf3b8cbbbd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 5320 bytes
font_01_sfnt_off000076c6.bin
17208085e1498fc6fb75e6557d4124d8e9a7d50a6c37aaccd27b480d478dc786		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C6 10276 bytes

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