Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9614e5f43f554a4…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 16:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff42868b131149c34ee512065b0416ae SHA-1: b879b388d348d18a8b96631c302bae2f8f8031ae SHA-256: a9614e5f43f554a41225b24d822266996481c4693f98663a54e0c498fc34e1f3
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=functional+analysis+sobolev+spaces+and+partial+differential+equations+brezis+pdf', which is likely intended to lead the user to a malicious site. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to distribute 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.cc/pify?keyword=functional+analysis+sobolev+spaces+and+partial+differential+equations+brezis+pdf
    • http://files.upperclementscottages.com/uploads/1/3/2/7/132712185/36bf318.pdf
    • http://files.nkshoporlando.com/uploads/1/3/1/8/131856257/2552171.pdf
    • http://files.sevenstarsamerica.org/uploads/1/3/1/4/131406434/a7c83.pdf
    • http://files.corinellafishingclub.com/uploads/1/3/0/7/130776864/9257f22c217.pdf
    • http://lesuzakev.theprismwithin.com/uploads/1/3/1/3/131380005/jafuzezovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/31833297285.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/potorexogezibobavedaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2809/3850/files/28885120221.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/natajibeziritexib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/xodimesedobobufigadotu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9678/3514/files/pharmacology_of_antiseptics_and_disinfectants.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4677/files/novus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/budding_in_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/ethics_case_study_with_solution_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/bureaucracy_in_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0431/0640/2453/files/53542289715.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_off00005e53.bin
365b0f113255368177a4da6019249407fff3dab77ae2cc7ed147bd3e9e42b8ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E53 5580 bytes
font_01_sfnt_off00007166.bin
942cd5aa2360b1b1f311f09e940bc836ffbe2b509c12e141efe86ca454f94759
pdf-font-stream PDF embedded font (sfnt) at offset 0x7166 10480 bytes