Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f70fc52fa5d2caf…

MALICIOUS

PDF

47.0 KB Created: 2020-08-12 22:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc04b2571807ce29de4b8e9c5ccb98d7 SHA-1: 84f2e526493cb34da9c4d455298b37ec3d7b0ec3 SHA-256: 4f70fc52fa5d2caf6b712cab5e3e268fd45d6f31ca6db2e0e7c044d849d3959f
128 Risk Score

Malware Insights

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

The PDF contains a prominent link to `https://ttraff.cc/wb?keyword=come%20modificare%20un%20pdf%20in%20word`, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm designed to attract users searching for PDF editing tools. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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/wb?keyword=come%20modificare%20un%20pdf%20in%20word
    • http://vuzef.4k-karate.com/uploads/1/3/0/8/130873810/6c5e2d111b07d.pdf
    • http://files.grecatrading.com/uploads/1/3/0/8/130874411/9464381.pdf
    • http://kopoz.harbottleaudio.com/uploads/1/3/1/4/131453060/fobapikez_zevuvaf_riwoxukena.pdf
    • http://files.mosspropertymgmt.com/uploads/1/3/0/7/130740316/jusorikepese.pdf
    • http://files.librarianlevenson.com/uploads/1/3/1/4/131437538/7316382.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/14213872128.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/21260343392.pdf
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/sokolizakefowegidexam.pdf
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/wexadagepur.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/dafumusafowijogok.pdf
    • https://cdn.shopify.com/s/files/1/0428/5077/9295/files/maxosifedolixexawelalap.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/41226082523.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/cadena_de_valor_bimbo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/17782040705.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5280/files/72482340191.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0432/9698/1147/files/6995906789.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_off00007b42.bin
eea630b937e8faa112723eda6f698a5c56de0c7dc73dc63737619d2dce8ef345
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B42 5088 bytes
font_01_sfnt_off00008c85.bin
efd5cd53ad3b645db4bfe0214ccf45d5186a2e0fc65c0f436b5275d53010b3e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C85 10052 bytes