Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2117022c6e9e6d…

MALICIOUS

PDF

47.1 KB Created: 2020-07-30 13:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa642075daaff5330226ebc7a3d1f716 SHA-1: bc743042bba77c6c1e01558e69e63d1a4bc68d23 SHA-256: 2c2117022c6e9e6d739cd5f963eaf9f4db89c3ec08c09e1a7f19ba592ba0a9f4
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring users to a malicious site via deceptive links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=java+swing+netbeans+tutorial+pdf
    • http://files.thepercolator.net/uploads/1/3/0/8/130813317/firor_nufariv_rajiduwavaze.pdf
    • http://files.drtonicamacho.com/uploads/1/3/0/9/130969131/dc12e64d3f55ee2.pdf
    • http://files.hungryformoneyy.com/uploads/1/3/1/4/131438150/e118d44b1e2.pdf
    • http://files.planetkitties.com/uploads/1/3/1/4/131407155/xebani_sakukitafaker.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/66556352651.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojijemorewowasimagaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/16537964462.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/fulefarolelimogagarol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0541/0471/files/55935976168.pdf
    • https://cdn.shopify.com/s/files/1/0429/4773/9811/files/gazisubusafaduwip.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/39388694359.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5348/files/pixapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/buniroxal.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/62833876893.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_off000079a5.bin
21103f09ff21bb8f3d9fe92f48ae0aed8bbfd0e801fc3f5faaee9300f8293155
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A5 5372 bytes
font_01_sfnt_off00008bfb.bin
8026af7d6028eb7d1deb37a7063922443c929aa182b33e0963a309901bf2bb84
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFB 10428 bytes