Malicious PDF — malware analysis report

Static analysis result for SHA-256 820504571eb6d2a3…

MALICIOUS

PDF

48.6 KB Created: 2020-08-06 19:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f31af18d53888aa9d54c1080047cf159 SHA-1: c3054ac1120ba311464fa12f35d104b6a74a94cc SHA-256: 820504571eb6d2a3574e4102365cf3e0a3bd1fc7bc123a30dcf89ec3ac579e99
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=pdf+annotator+online'. This indicates a social engineering lure, likely to trick users into believing they need to install a viewer or plugin, which is further supported by the 'SE_BROWSER_INSTALL_LURE' heuristic. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify. The primary intent appears to be directing users to malicious infrastructure via the ttraff.com redirector.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=pdf+annotator+online
    • http://files.agextonline.com/uploads/1/3/1/8/131856027/wawujetexaxibopux.pdf
    • http://files.mamasteessentials.com/uploads/1/3/0/9/130969847/3767124.pdf
    • http://files.leahkneipp.com/uploads/1/3/1/8/131871859/bawow_wizekun_forulaxiwob.pdf
    • http://pefomam.miainterafricatv.com/uploads/1/3/2/6/132695384/lukosawef-domuguzu-gomusefojomojem.pdf
    • http://files.allisondfredette.com/uploads/1/3/2/7/132740533/netilaxerares.pdf
    • https://cdn.shopify.com/s/files/1/0435/3612/2008/files/jinut.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/87300619299.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/71716973283.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/watuvuvitubowijodix.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/69295115370.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/66996536260.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9459/files/48111074350.pdf
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/macbeth_revision_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/sleep_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/5704/4890/files/foxaxopejuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/43737281956.pdf
    • https://cdn.shopify.com/s/files/1/0436/2164/6498/files/lewibevukepawusosijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/accounting_principles_weygandt_11th_edition.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_off00008237.bin
60cf8b615c13fa76cbdb4b00982373b4b0ba81a68b75d4183c9265c10b0f1779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 4724 bytes
font_01_sfnt_off00009255.bin
90f2d7cb220ea1c195294fba461ed5556f85ff2aa1aeee9e928d76c9a831a541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9255 10532 bytes

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