Malicious PDF — malware analysis report

Static analysis result for SHA-256 2819d2c43cebfda9…

MALICIOUS

PDF

45.9 KB Created: 2020-08-02 13:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b5356fe94deadfe8d0d70eee6e3adc4 SHA-1: c98885b321cbc6b75fbde222287a819eb9035641 SHA-256: 2819d2c43cebfda9f562a2f034c51689d6a4e0b764e797871dc2f35543b85c7c
140 Risk Score

Malware Insights

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

The PDF file contains a lure impersonating a cloud document sharing service, specifically mentioning "remove dropbox from mac". It embeds a large number of external links, many of which point to PDF files hosted on Shopify. The primary malicious indicator is the link to `https://ttraff.ru/pify?keyword=remove+dropbox+from+mac`, which is identified as a known malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise.

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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.ru/pify?keyword=remove+dropbox+from+mac
    • http://files.fresnonutritionsolutions.com/uploads/1/3/2/6/132683111/9806049.pdf
    • http://files.houndaway.com/uploads/1/3/2/7/132740296/c20f661c2.pdf
    • http://files.ciomentor.com/uploads/1/3/1/1/131163898/wedaler_jixevigigukobil.pdf
    • http://files.theworldofmcewan.com/uploads/1/3/0/7/130738814/gibaja_tawix_wododibura_musimetal.pdf
    • http://files.alisonrothman.com/uploads/1/3/1/4/131482953/f8cff.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/fipatezibujewusidibajipo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/53232001341.pdf
    • https://cdn.shopify.com/s/files/1/0437/9276/0994/files/44842799465.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/amd_dual_core_optimizer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/girufisodixarasadesik.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/xoluvurizuwapimufej.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/21527425744.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5559/files/zazanafekezowimanilodizek.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/kasezonoluzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/tiwuteguzov.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/votakafuvizadufanix.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_off00006c07.bin
cb7dfa157f14ae4902db833541d4d24ab2162d38ecd144505c8fa54e4c004e57
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 5368 bytes
font_01_sfnt_off00007e3f.bin
d281280040f2e683cf9caec572d1c693617c3900356d35c2c9daeaa398cd1747
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3F 14132 bytes