Malicious PDF — malware analysis report

Static analysis result for SHA-256 b940cbd542888640…

MALICIOUS

PDF

48.6 KB Created: 2020-09-02 17:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 438daf6be066f6822ca57b7a0aa84ebc SHA-1: 1462182d2a64fc1b1677b3a4b1b5677e6bdd1fba SHA-256: b940cbd542888640bddfebdc2c81830821e92372e8fd610d08def0bb59249da9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to malicious infrastructure. It also fires for PDF_SEO_LINK_FARM, suggesting a large number of outbound links, many of which are benign PDFs hosted on Shopify. The primary malicious URL is https://ttraff.me/pify?keyword=aldous+huxley+livros+pdf, which is likely used to redirect users to a malicious site. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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.me/pify?keyword=aldous+huxley+livros+pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/make_ubuntu_bootable_usb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/fovonez.pdf
    • https://cdn.shopify.com/s/files/1/0433/6258/2693/files/furegepimugevemowefovori.pdf
    • https://cdn.shopify.com/s/files/1/0457/4878/1212/files/3m_6200_half_mask_respirator_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/2960/0168/files/loxipudirugone.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/93447794042.pdf
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/waforolalezitewamapupopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7715/7542/files/wokojawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24413790208.pdf
    • https://cdn.shopify.com/s/files/1/0458/0992/6310/files/commandos_behind_enemy_lines_pc_fre.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70277109097.pdf
    • https://cdn.shopify.com/s/files/1/0437/2771/6520/files/cuadernillo_de_las_vocales_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0439/0407/3880/files/166008860.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/graphing_points_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0439/7511/4910/files/11436231526.pdf
    • https://cdn.shopify.com/s/files/1/0438/5705/1808/files/gre_practice_test_2017.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_off00007fe8.bin
386eb919e38f0a15af64a6848ecd65fbca943795906ffe819d0f45996c148aa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE8 5140 bytes
font_01_sfnt_off0000916b.bin
c509d30e88f113a9a8cb2ee79f27c0354ba5a6660d622d395a1d2333e36e1256
pdf-font-stream PDF embedded font (sfnt) at offset 0x916B 10548 bytes