Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8883ee21f3f5da…

MALICIOUS

PDF

53.5 KB Created: 2020-08-31 04:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43ec90d5814ca77117753995833f3de1 SHA-1: a396eb9efa02ba2e6710dd2a6fd41a0b6aead3c5 SHA-256: 7b8883ee21f3f5da64378e9796d4b1bed170b33cddc6319acf85e463a784f64f
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised as a download for study materials. It also features a large number of embedded links, many pointing to Shopify, which is characteristic of SEO link farm abuse. The document body, though heavily obfuscated, contains the target URL and keywords suggesting a lure for educational content. No scripts were extracted from this sample.

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.cc/wix?keyword=history+notes+in+hindi+pdf+for+ssc+cgl
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/46889047641.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/under_construction_page_html_code.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/89500066983.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/allahabad_high_court_order_copy_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/67219777609.pdf
    • https://cdn.shopify.com/s/files/1/0434/0288/7322/files/918110780.pdf
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/kesiwisoxasovukitanari.pdf
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/pijotubo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/17162788382.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/lol_ashe_build.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/84557531512.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/army_family_care_plan_regulation.pdf
    • https://static.usrfiles.com/ugd/b8c837_c87ea941250c487e8e6f9527c2a4aff2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad319baeaa3f4a14b46fe1e02621a7ea.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_off00006606.bin
c0ebfe73505e07cd04c59a465205b018fb0d4fb570c69d9bc4281161b9bd5bdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6606 5272 bytes
font_01_sfnt_off000077ec.bin
40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
pdf-font-stream PDF embedded font (sfnt) at offset 0x77EC 3720 bytes
font_02_sfnt_off0000834e.bin
27ce53e9d752ff729e02fc28b7cedba0a86f715fa54660c53f74baf1810385bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x834E 10328 bytes
font_03_sfnt_off0000a6b4.bin
862c3bd9942d5b264483cdf0504812a43c8280389d2c70b932ede9111767633c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B4 10920 bytes