Malicious PDF — malware analysis report

Static analysis result for SHA-256 a273866486beef35…

MALICIOUS

PDF

48.5 KB Created: 2020-07-24 11:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6855f1c8e7abbb384b046a8f1251c317 SHA-1: 283fe5f64d5ded4fef4ce2decab8de41e98738a8 SHA-256: a273866486beef35fb4282a631afcb4619beef9351a8a9f64fb9173c73fc855f
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One such link points to a known malicious redirector. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's not a typical user-facing document but rather a programmatic construct for link 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.cc/pify?keyword=calling+app+android+github
    • http://files.frankhagancontracting.com/uploads/1/3/2/6/132681404/zatamutofineve.pdf
    • http://files.bigairmarketingproducts.com/uploads/1/3/1/8/131871907/bf3e90b9.pdf
    • http://files.horseandbird.com/uploads/1/3/0/7/130776374/4774169.pdf
    • http://files.sunderland4autism.com/uploads/1/3/0/8/130814342/acaa9c4db3c2c0.pdf
    • http://files.fdryabc.com/uploads/1/3/1/4/131438471/depiworuku.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/56598997145.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/20140646695.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/xibolopolomokediseji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7384/6952/files/soxobijer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/satofekefekuwozavobijogut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80787326618.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/64047960321.pdf
    • https://cdn.shopify.com/s/files/1/0434/1130/8696/files/69021352725.pdf
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/bulali.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/43560876829.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_off00007974.bin
05beda3f63ab209c34af5379bd83f96cf1e42cc3fade8c8dec6847864a0f31c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7974 4972 bytes
font_01_sfnt_off00008a41.bin
d67326b9e3e0f7400a23a00ce49d5eb2f9a0385184d02c67d341baafc3017248		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A41 13596 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.