Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff4862bced3c244…

MALICIOUS

PDF

47.3 KB Created: 2020-08-22 02:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e84f6a9770840cecbcacdb148e02e5d5 SHA-1: 135b100eccd534311bcf2ab5d2d9fb29225a0763 SHA-256: 9ff4862bced3c244cb6f272b53ef12e5a2d0e20598b7505f699bc37a96dff14d
130 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to lure users into downloading further content. The presence of a 'download button' heuristic further supports this attack pattern. The document body contains garbled text, but the embedded URL and the heuristic firings clearly indicate a malicious redirection attempt.

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.cc/pify?keyword=barron%2527+s+toeic+6th+edition++free
    • http://files.christinarjackson.com/uploads/1/3/1/4/131438142/sexiw_badavixed_nanepasif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4780083199.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/norme_iso_9001_version_2020_afnor.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1364/files/lutowovajikitonumowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/french_learning_materials_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/telumulewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/86804751377.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/9267103519.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/tevurejewanemag.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/properties_of_absolute_value_inequalities.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/46133622421.pdf
    • https://cdn.shopify.com/s/files/1/0463/0183/9522/files/microsoft_interface_design_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/28230398509.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0211/files/interviewing_skills_training_for_managers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b3b.bin
550ef77f93ffffc0e446753771eb34718ea87351372f47963aa9c6b2abb8cd71
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3B 5312 bytes
font_01_sfnt_off00006d42.bin
a0907b49189b2eb669f09f2f091f44e006d5e7bc1a67d7a390fcaaaba7e04724
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D42 14424 bytes
font_02_sfnt_off00009af6.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF6 16204 bytes