Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be661dc99a21127…

MALICIOUS

PDF

67.1 KB Created: 2020-08-24 07:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 948a73dba89f4c2e8c50e02842f3851e SHA-1: bb3e4024cd393fb2c114d9d2db86ab9f24a3dc31 SHA-256: 1be661dc99a21127b4a876f98caa3aee8762606a462989e5cb002fcc6ddb6789
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=brca1%252F+brca2%2528+selected+variants+report', is identified as a known malicious redirector. The document body itself is heavily obfuscated and contains the same redirecting URL, suggesting the primary purpose is to lure users to malicious sites.

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=brca1%252F+brca2%2528+selected+variants+report
    • http://suxapof.classiquerr.com/uploads/1/3/0/9/130969179/6539710.pdf
    • http://files.lindsborgadhocroundtable.com/uploads/1/3/2/8/132815015/rubinalujew_bijuri_fukisimen.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/construction_contract_addendum_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/sifobe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6774/files/by_the_way_bass.pdf
    • https://cdn.shopify.com/s/files/1/0438/5089/1424/files/giwizi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/best_bp_cuff_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8854/2872/files/94037364640.pdf
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/astm_a325_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/43886291074.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/leon_battista_alberti_on_painting.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/kiwobowomuvejegefifixag.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/programming_in_ansi_c_7th_edition_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/7228/0981/files/rowupojow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.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_off0000c761.bin
aba1c7539b694d3053c17040a2573392b061ecd3bce5081645e0b6eff143bf48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC761 5612 bytes
font_01_sfnt_off0000da95.bin
02186b144f99c98c95dfd8c37f744d47ddfa843b3f57c90788fe0d5390088657		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 10676 bytes

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