Malicious PDF — malware analysis report

Static analysis result for SHA-256 698c96263ae60103…

MALICIOUS

PDF

49.3 KB Created: 2020-08-15 08:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a75072366d9bccc47d0970a0d3fc80b SHA-1: 85b0518862192091d44e479926d8fe5e960c93ef SHA-256: 698c96263ae60103fb0a4a7cac566bc2f852e55338e72a88397239a276fa446f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'spreadsheet financial templates' and the malicious URL, suggesting a phishing or scam lure. The presence of a large number of external PDF links further indicates a link farm or redirection scheme.

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.cc/pify?keyword=spreadsheet+financial+templates
    • http://files.margueriteperret.com/uploads/1/3/0/7/130776177/rumemoxege.pdf
    • http://fozabiz.pairtradingpro.com/uploads/1/3/1/6/131637030/6fa001.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/3541253103.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/expenditure_approach_vs_income_approach.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/71065464468.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/jegawixigeneterotimafuzo.pdf
    • https://cdn.shopify.com/s/files/1/0448/1817/0018/files/50539109140.pdf
    • https://cdn.shopify.com/s/files/1/0452/4287/6061/files/brucellosis_in_humans.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/941137889.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/85379915270.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/aparato_respiratorio_histologia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074e7.bin
e9df1abf47a688c52bbf36275161d4c71dd3d5463c3e540779115c3c600865d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E7 3304 bytes
font_01_sfnt_off000080cd.bin
c9e4a831be0a67dfe76b1885a6c87df4ababfccf87a4d16bf93890ab97a784bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x80CD 5500 bytes
font_02_sfnt_off0000934f.bin
d68b09f05af348c0ca6f54991b1e22071db67139919f9320a558ba654672d0e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x934F 10824 bytes