Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc3aec4052c2ca8…

MALICIOUS

PDF

86.6 KB Created: 2020-08-19 04:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd8eb0638fd550d858cbd15a8b47fe59 SHA-1: c7cb5dabbffc424804794e7d0863cd6bbb25315c SHA-256: 9fc3aec4052c2ca888fca4a695427fc6439ec7a8948eefc38877d9f897d3d3ce
158 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains multiple heuristics indicating malicious intent, including a critical finding of a malicious redirector link and a PDF link farm. The document body, though partially corrupted, contains the phrase 'General pants returns form' and references 'wkhtmltopdf', suggesting a lure to a fake return form. The presence of a malicious redirector URL and a large number of embedded links, many pointing to Shopify domains, indicates a phishing or scam attempt designed to lead users to malicious infrastructure.

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=general+pants+returns+form
    • http://xunupizem.steepyourcuriositea.ca/uploads/1/3/1/0/131070374/4275731.pdf
    • http://files.impunity.site/uploads/1/3/2/6/132681204/lefopogi.pdf
    • http://pebosena.owenty.com/uploads/1/3/0/8/130873710/86795.pdf
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/jaramigodotodivawizewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/cbse_syllabus_for_class_12_informatics_practices_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/dodunovudof.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/22542597882.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/amelie_comptine_d_un_autre_t_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/hairdos_for_long_hair_formal.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5285/files/rodazebip.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/dewowiwawano.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2646/files/bna_to_lax.pdf
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/29980849669.pdf
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/javascript_moment_format_month_name.pdf
    • https://cdn.shopify.com/s/files/1/0449/3859/2424/files/human_paleontology.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_off0001163b.bin
09107752237d912e3cfeaf6226c37afaceb530a9dff011274accfadc22ff0870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1163B 5076 bytes
font_01_sfnt_off0001276d.bin
a0dab57ae4e0970c2df39d9423bcf80203696c8f6f66deade85b620bd6eac95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1276D 11236 bytes

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