Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c736bf7c655f526…

MALICIOUS

PDF

43.4 KB Created: 2020-08-31 06:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1272dff4018601edac1033d622daa1af SHA-1: 8bb95b0c891d0ee8a65cd86d3d6165e6bed8a27d SHA-256: 4c736bf7c655f52665e71b20ba7266e5c6abc12ad61bc0eecdaebb3474a12c7f
128 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a large number of external PDF links, suggesting a link farm for SEO manipulation. The document body also contains a call-to-action phrase and the primary malicious URL. The presence of a malicious redirector URL and the SEO link farm strongly suggest a phishing or malware distribution attempt.

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.cc/wix?keyword=windows+vista+ultimate+32+bit+iso+download
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/77011107478.pdf
    • https://cdn.shopify.com/s/files/1/0449/5238/7739/files/velexaxibazovij.pdf
    • https://cdn.shopify.com/s/files/1/0439/7039/6318/files/85473630487.pdf
    • https://cdn.shopify.com/s/files/1/0432/8767/5036/files/12937760580.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/mobesoxonerujafijefotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/59451378396.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/ignou_ba_2nd_year_assignment_2020_19_solved.pdf
    • https://static.usrfiles.com/ugd/bf07b1_d595c925ebb949fdb6fe094c8e1895e5.pdf
    • https://static.usrfiles.com/ugd/accd1f_9f3ad741234944528e22eecba0208421.pdf
    • https://static.usrfiles.com/ugd/b8c837_b680fbf460504cafb5037c88a2e77bf4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f497ba781d34cb5a5cacf40d1b91d67.pdf
    • https://static.usrfiles.com/ugd/cc14e4_5e177f3e9b384668bb773f98aa1861c9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29529942485.pdf
    • https://cdn.shopify.com/s/files/1/0436/2777/4115/files/67556431536.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ef9.bin
1cf2bf29d2eb031bc84b45829d4091f69f93a3dad98c28f0d6703bb86948652a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF9 5356 bytes
font_01_sfnt_off00007134.bin
c7ddeb977aebfbc34762ca7c6703ad1ea79a0bad0f0a3c1de3beef221c17d3d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7134 9808 bytes
font_02_sfnt_off000092bb.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x92BB 4324 bytes