Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4acf7fc7550c887…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 11:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fc9d738d4c9912f00a47079aa7691b6 SHA-1: ed8b1968bf11cfa29feaaf8a37b511ec4c5ec666 SHA-256: a4acf7fc7550c8875684ada6a42ab3aa40f59990bf6bf761d44853dd4e2df021
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a malicious site. The PDF structure and the presence of numerous links indicate a link farm or redirection attack.

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/wix?keyword=fortress+of+the+muslim+bulk+order
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/3881524499.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/36404861876.pdf
    • https://static.usrfiles.com/ugd/cc089a_000b7cd319a14657b179c26a45b6dc4e.pdf
    • https://static.usrfiles.com/ugd/760101_3633ca06bb2748b1a63e1532c44b2ee2.pdf
    • https://static.usrfiles.com/ugd/c3548c_d905cf7dbe4541178af3e1b6047bdcd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0527b986961c445b9b59675309c63cd2.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/23064832711.pdf
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/pearson_geometry_textbook_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/50294390038.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/24191286318.pdf
    • https://static.usrfiles.com/ugd/b8c837_01436e5cf17443a6b313bf18edc2cb05.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8d42a2cdc334486ab30289d205be209.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_off0000697a.bin
266ccad7c27377e449d045fc85d81f8ba844be8dd4b6d137eb220d98220bf375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697A 5096 bytes
font_01_sfnt_off00007aa4.bin
b953d2c060df15b9f3ae939868e9284f57d069a8473c82fb90a9348cf44c533a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA4 10308 bytes

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