Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33b7d5f1b63c9da…

MALICIOUS

PDF

45.7 KB Created: 2020-08-28 01:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00315c1fb496700bc79d708815ce55d0 SHA-1: 1ac1557ca4724ab0d8d23a5c43303f0906dbbbd6 SHA-256: c33b7d5f1b63c9daec2450ffbc73e1eca01f989c7921d5c9a587a5d001700fc1
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing on a link to a known malicious redirector at 'https://ttraff.me/pify?keyword=waiting+ha+jin+pdf'. Another critical heuristic identified a mass external PDF link farm, with many links pointing to shopify.com domains, suggesting an attempt to game search engines or distribute content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious links indicates a likely phishing or malware delivery attempt.

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.me/pify?keyword=waiting+ha+jin+pdf
    • http://firufiz.year8religionlynam.com/uploads/1/3/0/7/130776760/zutan_fakujokemi.pdf
    • http://files.terangajuice.com/uploads/1/3/0/7/130740066/2173758.pdf
    • http://files.christinemcahill.com/uploads/1/3/1/3/131383665/vapupesav_wisusapose.pdf
    • http://files.thelookbyus.com/uploads/1/3/1/4/131453990/nedunododaso_sawakenole_buxipe_badoxepunidawi.pdf
    • http://files.floridatennismagazine.com/uploads/1/3/0/9/130969967/jamaritidepufi_bogutimuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/18638996231.pdf
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/mujegewor.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8817/files/bulepoxer.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8304/files/fugudesu.pdf
    • https://cdn.shopify.com/s/files/1/0461/5405/5843/files/jagixuwefoxizum.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8509/files/jekusuripibewoje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/amparito_roca_banda.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/20012973448.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/kapasuvozotamulusuvironet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/74325757584.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/9360554493.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/wetivupuxedajon.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_off000075dd.bin
fb9b076fba69938c63bb8e50e493a6fd40be6f0a799346ab9193ef1552946ae3
pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 5084 bytes
font_01_sfnt_off0000873f.bin
daf696e4ca9f4e323b0b867d48b863dc48f05a90cadf8a937092fd0eaed76686
pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 10088 bytes