Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedbc749dfc3f763…

MALICIOUS

PDF

36.1 KB Created: 2020-08-24 10:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93965e0a9b779ab7066941f81b6d8625 SHA-1: d3aa9d5b4fb4cc3338755becef83390a727bf7cb SHA-256: cedbc749dfc3f76343d3bcc34afa20e41fde0ae1bd37437fd051214b9120852a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting seemingly benign documents. However, one critical heuristic firing indicates a link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect users to this malicious site, likely for further exploitation or phishing.

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.ru/pify?keyword=bajrangi+bhai+movie++hd
    • http://files.groepberton.com/uploads/1/3/0/9/130970008/815233dbfad4b.pdf
    • http://biporeja.mrogrady.com/uploads/1/3/1/4/131482823/wofode_lawivowe_nubodideme_wivoju.pdf
    • http://jarexu.ccpublicschoolsdance.com/uploads/1/3/0/8/130874540/fozumutomed_dukobopakiveli_zijibiz_debewid.pdf
    • https://cdn.shopify.com/s/files/1/0447/6777/2821/files/abaqus_theory_guide_6._14.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/chapter_4_time_value_of_money.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/pikujemitigebimoximowovid.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/84749540351.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8807/files/54830370202.pdf
    • https://cdn.shopify.com/s/files/1/0463/3133/0721/files/blow_molding_process.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/house_rules_template_for_tenants.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/fitokakuzabezolomom.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/design_and_simulation_of_dc_dc_boost_converter.pdf
    • https://cdn.shopify.com/s/files/1/0432/9167/2736/files/37146477531.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/veterinary_microbiology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/wavemamamiletepege.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_off00004e69.bin
11cf56f8a46b93379a10f6bd378f3316439fb0bad5d6ea146e773d7baee0b27c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E69 5352 bytes
font_01_sfnt_off0000607b.bin
b3ec6851594ec06b2f7f76fea7ba5e6c77e4a217e23d039916f0d929a5a8a52f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 10248 bytes

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