Malicious PDF — malware analysis report

Static analysis result for SHA-256 482ac1bebbd61214…

MALICIOUS

PDF

49.4 KB Created: 2020-08-09 11:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65038a9fe02610de275b96d2c05f8d73 SHA-1: 22cf8d6ef3a107f1d445dee4c4c5816d5d37902e SHA-256: 482ac1bebbd6121435b1d4ab67f50824123f348dcb7e352b7cbbfc0a03b41d90
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used in SEO link farms to manipulate search engine rankings or to distribute malicious content. One of the embedded URLs, 'https://ttraff.com/pify?keyword=basic+differential+calculus+formulas+pdf', is flagged as a known malicious redirector. This suggests the document is part of a campaign aiming to lure users to malicious sites, likely for phishing or malware 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.com/pify?keyword=basic+differential+calculus+formulas+pdf
    • http://vagagis.fiveboroughbucketlist.com/uploads/1/3/0/7/130739919/nekafilakitux.pdf
    • http://files.donandrewsstudio.com/uploads/1/3/1/0/131071240/95149d17.pdf
    • http://files.brighterhorizonsbrighton.com/uploads/1/3/1/8/131871909/4e684bef8f.pdf
    • http://files.diluvioaz.com/uploads/1/3/1/4/131482975/juzugerizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/catalogo_cedulas_do_brasil.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/64594753861.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/sakexovoremubogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0686/9147/files/filafelodulidabasu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/nigemakabozepebezawiroxuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8231/6957/files/mojonamosorabikigojavaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/76008797542.pdf
    • https://cdn.shopify.com/s/files/1/0437/6569/4613/files/bugubugowipefadozodulet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/differential_calculus_by_das_and_mukherjee_51_edition_solution.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/movabuwidaja.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/12500831402.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_off00007a6d.bin
406e012ea5eccc62b5bddef6481dfc512c295b1f3a105f26aa49bf70a123b63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6D 5348 bytes
font_01_sfnt_off00008c84.bin
9e1d12c2ddfd9a910841cf9f6c3cec10f692c9ab64195135201bf6055e8558fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C84 14344 bytes

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