Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4183ace8d8a4ffb…

MALICIOUS

PDF

62.7 KB Created: 2020-08-12 20:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c14b97016341df9506aa93c845df0d3a SHA-1: 94509ceeb4f5ffd29c1bbbdb89dc41f53633677b SHA-256: d4183ace8d8a4ffb1edc19f3c6b3cfe7ca0df6745012c41ad5603e99c3058b2a
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=intel+assembly+language+pdf', suggesting a lure to a malicious site. The presence of numerous shopify.com links and other file-hosting domains indicates a link farm designed to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=intel+assembly+language+pdf
    • http://files.nicolepachecomakeup.com/uploads/1/3/1/8/131856076/911d62028fdd375.pdf
    • http://files.mrucubsdanceteam.com/uploads/1/3/1/8/131857445/wimanofarotutozo.pdf
    • http://files.waimayyau.com/uploads/1/3/2/3/132303061/2275215.pdf
    • http://files.hiagodesena.com/uploads/1/3/1/4/131482962/pojuzarefi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8209/files/medical_terminology_list_of_words_and_definitions.pdf
    • https://cdn.shopify.com/s/files/1/0428/3501/7884/files/wimokevaxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/4413345096.pdf
    • https://cdn.shopify.com/s/files/1/0432/0673/8079/files/udp_coppersurfer._tk_6969_announce.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/jezezezetogalasaxum.pdf
    • https://cdn.shopify.com/s/files/1/0440/1358/4542/files/74422829044.pdf
    • https://cdn.shopify.com/s/files/1/0448/5169/1680/files/halo_2_gravemind.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/rosamunde_pilcher_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6256/files/24664865621.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/zavexoripadovitugutodene.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/14720547722.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/90374672753.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_off0000a5be.bin
596f915228d42dab1ec65ea27eec567ce89a2018a24dc47b0f7dbac8e016dd7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BE 5168 bytes
font_01_sfnt_off0000b738.bin
34ab696ed2270171208286a9be12aff92d247eb7481c81e93ae09312b803ce50
pdf-font-stream PDF embedded font (sfnt) at offset 0xB738 12152 bytes
font_02_sfnt_off0000dfe0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 4324 bytes