Malicious PDF — malware analysis report

Static analysis result for SHA-256 936678908438d3af…

MALICIOUS

PDF

42.4 KB Created: 2020-08-25 13:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f51dbc1086609a616c09b41244847ed1 SHA-1: 807e37b95506bb238bf593d06de3752fea6ed81c SHA-256: 936678908438d3af5b8f2d9663a545d0a24ecc79503a105166fb4882aef151eb
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=synaptics+windows+7+32+bit'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The presence of a 'download button' heuristic further supports the lure mechanism. The document body, though heavily obfuscated, contains the malicious URL, suggesting the intent is to trick the user into clicking the link, likely leading to a further stage of infection.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=synaptics+windows+7+32+bit
    • http://files.revgymmn.com/uploads/1/3/1/6/131606165/gisevajikesi.pdf
    • http://files.wheelingchoir.com/uploads/1/3/1/3/131383771/54f05a8cbfd.pdf
    • http://bopebane.arizonacornholeassociation.com/uploads/1/3/0/9/130969060/d7dcfa1e.pdf
    • https://cdn.shopif
    • https://cdn.shopify.com/s/files/1/0432/7319/1588/files/zivujirimikasu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/vefasebekelixorevitumunej.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/bitabovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/absorption_costing_and_variable_costing.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/rofadali.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/77296072316.pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/multiplying_two_binomials_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/bonokedaxag.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/wubazokuzegitetalukek.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/20785762592.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/what_is_synaptics_pointing_device_driver.pdf
    • https://cdn.shopify.com/s/files/1/0454/2119/9516/files/alarm_manager_in_xamarin_forms.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/20415050570.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_off000063cf.bin
d3f848dcc54796e4bea73dcb1570f28b3389f61517fbcf4ac52a7e0cb1847812
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CF 5752 bytes
font_01_sfnt_off00007782.bin
a55a62de58e77b336a8676f9ef5d1e773dffe088218414b4eedef77c96832db6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7782 11048 bytes