Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf6f3fb567417ee…

MALICIOUS

PDF

41.5 KB Created: 2020-07-31 06:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fd1cbd19adce0ec32cdd46bbb0955e4 SHA-1: 254fa6446530cec924b7f52172bf1ac7bf1dbac8 SHA-256: 5cf6f3fb567417ee16b104c19d3a41ecd0a040e690fd03be14a7f8f2c6c801be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'Bose soundlink mini ii manual'. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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.ru/pify?keyword=bose+soundlink+mini+ii+manual+espa%25C3%25B1ol+pdf
    • http://files.matthew-j.com/uploads/1/3/1/4/131437443/bopamowelo-vubavum-zoberes-gaxej.pdf
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdf
    • http://files.stillmomentsbycarmen.com/uploads/1/3/1/0/131069763/f4dacac602c0b11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8094/0709/files/gopobipabegulesididenu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2037/files/sumuzabamikonusisiror.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/pegerakoloburokij.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/15240225354.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/69758329547.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/57028409853.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/63059895745.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/pifapugire.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5404/files/lowatikibi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/39063798984.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/zazuligizesosal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/30225522909.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/56565954358.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060f3.bin
738cd6a60133673cf2a2daabc199657bba4b6ebd3d394e135338b03696ac512b
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F3 5216 bytes
font_01_sfnt_off00007253.bin
2c76273c52cb549a4f2702f70fabc7e6473f1ee6316fddae017a8c70c7539833
pdf-font-stream PDF embedded font (sfnt) at offset 0x7253 10664 bytes