Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78e8859a7259f6d…

MALICIOUS

PDF

130.6 KB Created: 2020-08-05 07:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 469318645b3b54cf06259e0164325692 SHA-1: 9cc1b6b378201f5a99ac21e8fb10edd545688ac9 SHA-256: c78e8859a7259f6dfbb87b58fb18f6d99ffa74ad3a9a55e9705829fdca31b486
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=university+calculus+early+transcendentals+2nd+edition+solutions+manual+pdf'. This URL is presented within the document body, disguised as a link to a calculus textbook solutions manual. The redirector likely leads to further malicious content or downloads. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, suggesting an attempt to distribute malicious links broadly.

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.cc/pify?keyword=university+calculus+early+transcendentals+2nd+edition+solutions+manual+pdf
    • http://files.bvl.ca/uploads/1/3/1/8/131856476/2991430.pdf
    • http://files.housingamericacampaign.org/uploads/1/3/1/4/131437878/jareru.pdf
    • http://files.yoansewingstudio.com/uploads/1/3/1/4/131437295/5621048.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/depodezadomojezopidun.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/cable_tray_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/9475338667.pdf
    • https://cdn.shopify.com/s/files/1/0436/7712/2713/files/kogodakapibameputonigi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7757/files/aileen_wuornos_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3925/files/66513226455.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/84089979548.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60801944673.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/camera_follow_script_unity.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/gapuzivuvib.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/wekefilixojizepekogafiru.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018cc6.bin
1ac927e3904aa8e0852c6a7ce9344c9ed800ec358a5ba35988560d44dfeb6e7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18CC6 5468 bytes
font_01_sfnt_off00019f4f.bin
ec18ae3cd523c5a681fd1de7a02a568dcb88337a4f8c71d3c41e9cf77ec37309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19F4F 17788 bytes
font_02_sfnt_off0001d6da.bin
ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6DA 16148 bytes
font_03_sfnt_off0001ebd2.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBD2 4324 bytes

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