Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e057c62e8b4b43d…

MALICIOUS

PDF

49.7 KB Created: 2020-07-24 13:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005361941012cb8b3f74c04671cd804b SHA-1: 8764fdefe0fd1a3ba6208dabbd096b84cdc0763d SHA-256: 4e057c62e8b4b43df8ad83c0caa6eecf755dea86cfc919a593fc5019fa1945a9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Chopin piano nocturne pdf', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/wb?keyword=chopin%20piano%20nocturne%20pdf
    • http://files.midwifemaddy.com/uploads/1/3/1/3/131380612/2f8bdde3.pdf
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdf
    • http://files.northwesthorsesupplement.com/uploads/1/3/1/3/131379680/baveso-sobozizoburonig.pdf
    • http://files.walkingstick.org/uploads/1/3/1/3/131381640/ea5acf.pdf
    • http://files.cnpstudiotour.ca/uploads/1/3/1/4/131409761/pegofuguzojapavotul.pdf
    • http://files.midwifemaddy.com
    • https://cdn.shopify.com/s/files/1/0430/9434/3829/files/49448503160.pdf
    • https://cdn.shopify.com/s/files/1/0437/4475/5866/files/sitonaro.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/kamaposemulegup.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/zabop.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/66513292259.pdf
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/lizupilojexivavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2196/files/nuzipa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0935/files/96625791836.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/niwefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/8086331280.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/legewimidupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/guveremosabupozotegifap.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_off0000701f.bin
34e79c9d1b97790bb7caeb40a6de79eafa85252cc0c6a521281e1faed906e031
pdf-font-stream PDF embedded font (sfnt) at offset 0x701F 4940 bytes
font_01_sfnt_off000080de.bin
42e4376e29301d09d926ebecb84092fa1c921d541b565d06b903a95bd5a4291c
pdf-font-stream PDF embedded font (sfnt) at offset 0x80DE 10260 bytes
font_02_sfnt_off0000a42c.bin
67892196bf5908ec3e282366dec55eadd47d8d0e50ed27c9edd305c7b85f0b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA42C 16120 bytes