Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5c395fff4bf015…

MALICIOUS

PDF

45.4 KB Created: 2020-08-12 10:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56f299a3eb85a0e71cccd1810ec35b76 SHA-1: 7ca5be9e5a90ce6756c861f98c3fc3d6300fa485 SHA-256: ff5c395fff4bf015fcdac14cdeecab3d1132c8b996a0e16100ffca4bee4244d3
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, disguised with a keyword suggesting a passport application form. The document body, though heavily obfuscated, also contains the same malicious URL and numerous other URLs hosted on Shopify, likely as part of a link farm to improve search engine ranking for the malicious lure. 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/pify?keyword=passport+application+form+kenya+2020+pdf
    • http://files.racheleveholmes.com/uploads/1/3/1/3/131398515/fijasonav.pdf
    • http://files.deepgreenbushschool.org/uploads/1/3/2/6/132680808/5873391.pdf
    • http://files.arcmowercounty.org/uploads/1/3/1/6/131606666/dc4af4da.pdf
    • http://files.destinyhorses.com/uploads/1/3/0/9/130969172/kegik.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/47154683202.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9578/files/upsc_ifs_botany_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5462/files/45342715560.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/85040989252.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53981477141.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/45083002754.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/10437927267.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/7515533387.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/ansi_asq_z1_4.pdf
    • https://cdn.shopify.com/s/files/1/0440/7666/2934/files/cero_absoluto_allan_folsom_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/movimiento_circular_uniforme_formulas.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_off00007151.bin
871e0fa80ffe6e2356e694277d745a9faf820ca38ad89bf2b875230301335872
pdf-font-stream PDF embedded font (sfnt) at offset 0x7151 5740 bytes
font_01_sfnt_off000084d3.bin
c037f3a6343fe40055e356b0f7a27c99fbb9db1d5b924ed9aa9215ce789fd43e
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 10404 bytes