Malicious PDF — malware analysis report

Static analysis result for SHA-256 7413c172fed98f5b…

MALICIOUS

PDF

48.9 KB Created: 2020-08-30 20:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d60baf666b46a035b2a210179981128 SHA-1: 32dc0795c5c1e7e1664ac2ffd2a638209238db65 SHA-256: 7413c172fed98f5bbca7f4b6dd50a48a974bfd649e5fb4a88e440d258efdd563
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with the first being to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the text 'just for laughs' and the malicious URL, suggesting a social engineering lure.

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.com/wix?keyword=just+for+laughs
    • https://cdn.shopify.com/s/files/1/0432/1715/8312/files/ansys_maxwell_full.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/govuzenufoxifotuvez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7619/8305/files/fegogigiketefivosopov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/8639111981.pdf
    • https://static.usrfiles.com/ugd/81d6a4_0e88c6757d1e46319397c14f0915cb39.pdf
    • https://static.usrfiles.com/ugd/7dd30d_f7fdc3299b7340cdb497d2ed56bff81b.pdf
    • https://static.usrfiles.com/ugd/5b5da7_54581d503e1a44fba9cca6c0cd3763ff.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0440/4045/4294/files/coordinating_conjunctions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/61656481169.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/85658469909.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_off000083f7.bin
a96d1fd3c4c288387ca377c05e98c42d26a4ddf3efa308beb1bded6ba4a27fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F7 5016 bytes
font_01_sfnt_off000094fa.bin
e26d4901aeab688a32c3fe11e1e267c9fe405348bb9498844d735b8c19d6576d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FA 10088 bytes

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