Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10da07ffa44c31d…

MALICIOUS

PDF

33.5 KB Created: 2020-08-31 06:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0041bbdce0ecca5c63ad0bc9010d719f SHA-1: 633cb25d9794bd69113acdfe243e80964875b94d SHA-256: f10da07ffa44c31dfd0888c224c8bcf5a2674df4024f124d2f31c5735fff88ab
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=whirlpool+awg5122+user+manual'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of embedded links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=whirlpool+awg5122+user+manual
    • https://cdn.shopify.com/s/files/1/0434/6013/3031/files/pdf_to_word_converter_online_free_without_email_editable.pdf
    • https://cdn.shopify.com/s/files/1/0432/6408/2073/files/maryland_magisterial_docket_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/20889074685.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/7570928774.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/4_times_tables_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1373/files/management_of_acute_pancreatitis_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/8591/3500/files/auditoria_financiera_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8090/6907/files/47649304610.pdf
    • https://cdn.shopify.com/s/files/1/0462/4269/3269/files/19238485900.pdf
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/wuponigupebuvo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/business_plan_template_restaurant_canada.pdf
    • https://cdn.shopify.com/s/files/1/0462/2542/4535/files/bootstrap_form_example_w3schools.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/39638172679.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/ecological_theory_in_social_work.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4982/files/24093471441.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_off00004440.bin
4b2cdfc73dece4eb5c8ce6c43e38fe841934a07b73fcb564b7e9d3fe28d0adeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4440 5648 bytes
font_01_sfnt_off0000576f.bin
3f44217b655c3888528cc8cac97f3957b3444a6088b4c4433df1b461e9f661d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x576F 9924 bytes