Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3429d48588a65e3…

MALICIOUS

PDF

34.2 KB Created: 2020-08-19 03:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d4ff2e5cb0e3fc318c5afdf8833510e SHA-1: c3bbbcf620cd35d62168c2a11484551a1007d765 SHA-256: b3429d48588a65e3c84f2d2f562397bac1bd4d851185b7211fae439af7d2e1ba
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=possessive+nouns+1st+grade+worksheets'. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of a link farm suggests an attempt to leverage SEO for distribution.

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.ru/pify?keyword=possessive+nouns+1st+grade+worksheets
    • http://fazobox.csdesigns.com/uploads/1/3/2/6/132681670/456441.pdf
    • http://tefomeg.michellebergermd.com/uploads/1/3/2/7/132741009/5f1ac9e672e86c.pdf
    • http://lanopabum.iclipse.co.uk/uploads/1/3/0/7/130776445/lagatojaxala.pdf
    • http://files.crumistuff.com/uploads/1/3/1/0/131071277/wuwikudofipisetuxode.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/ballast_water_treatment_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/85254268642.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/sonuvudewuninux.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/wopawutizigaverobepibux.pdf
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/20067862482.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/komotuvapepulebuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/sir_arthur_conan_doyle_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3198/files/cost_plus_construction_contract_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/pharmacy_technician_study_guide.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_off000048a4.bin
95e75246bd2a05b840248f24362d91561b853fa1abf8c13eba03f370a120c409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48A4 5324 bytes
font_01_sfnt_off00005ad4.bin
0cb5b024811994a3363a25ef60d205df02c2737fff30c2ba5177320450b09289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD4 9764 bytes

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