Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50168f3dc42e259…

MALICIOUS

PDF

35.9 KB Created: 2020-08-20 19:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a3baa5e7620b2e50d3bdb4689f6dacb SHA-1: 4673af74983d05ea863aaf8f96ef43d8e78c3159 SHA-256: e50168f3dc42e25917b4b8a4abe68a2630064221b30be579c7bdf9e44c793f72
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself is largely obfuscated but contains the text 'Ang kaibahan ng tabloid at broadsheet' and a URL that appears to be the primary lure. The heuristic firings indicate the PDF is acting as a link farm, directing users to potentially malicious content.

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=ang+kaibahan+ng+tabloid+at+broadsheet
    • http://files.strongholdequineequipment.com/uploads/1/3/1/4/131438823/nepasa_bokobibig_fufatejikawonab_miwezuzarodefo.pdf
    • http://radevu.oatfieldfarmandstables.com/uploads/1/3/0/7/130775443/tajaf.pdf
    • http://files.sacpdm9.com/uploads/1/3/0/9/130969310/0db305feb36d.pdf
    • http://files.teaching.yfolajimi.com/uploads/1/3/2/6/132696325/zeniburaninedem-lewup.pdf
    • http://files.jimsv8vair.net/uploads/1/3/1/6/131636712/1818086.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/pixenejuxigifudepinatu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3263/0680/files/suvonujimufetiga.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/marital_settlement_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/ledusapemutebukibasove.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/articulos_cientificos_scielo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/31750033187.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/46214198557.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1553/files/871436405.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/rivavago.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/vagakibesugugijunok.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/67327060652.pdf
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/bikini_body_guide_12_week.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_off00004d82.bin
b73fe0465703b2d1449c81645adc809ca8548557d845684b38765ea548873bd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D82 5280 bytes
font_01_sfnt_off00005f61.bin
9d309a5713d005cbd5db0f6b19c7f9ef3f594c259aef72c6d62ba9fb0090d162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F61 10392 bytes

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