Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a788d17f870876…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 22:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a5e05b2c48560fa8157da2f8427edaa SHA-1: fe7319d6aba7567704b507a26e748e00bf7bde09 SHA-256: 23a788d17f870876684df7a320fcfeaeb2d53eaeb645c5000cd0df0c95f614c0
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector. The document body, though corrupted, appears to contain text related to a 'sales commission agreement template california' and includes the malicious URL. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, which is then used to lure the user to a potentially harmful site.

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=sales+commission+agreement+template+california
    • http://nataw.arcdesoto.org/uploads/1/3/1/6/131637814/8d3796dd191ae.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/dalapikitojiguwatin.pdf
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/html_editor_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0450/0901/0852/files/76060227574.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2783/files/bestiario_libro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6594/files/tixosixar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6471/files/limpieza_de_sangre_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/1917/3029/files/zexizoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/32397857743.pdf
    • https://cdn.shopify.com/s/files/1/0435/3218/9860/files/bantu_migration_history.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7663/files/wegob.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/immersive_first_person_skyrim.pdf
    • https://cdn.shopify.com/s/files/1/0437/9885/5837/files/sql_tutorial_for_beginners_with_examples.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_off00006089.bin
2bd68fdb2fd305204e92e52cef57f6ae6edba0c6454cf676b53bf50963802055
pdf-font-stream PDF embedded font (sfnt) at offset 0x6089 5224 bytes
font_01_sfnt_off00007226.bin
0bcfb9a69ca3179f0be2e51a37e953fc47168c59c419f1ff9e9d14278e6970fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7226 9120 bytes
font_02_sfnt_off0000913e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x913E 4324 bytes