Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab457cbb1703796…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 04:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb0f0f65829327a3a68d43ceeb1931e1 SHA-1: ae98a2a373958f5a30936e9742fd34f5b5f40163 SHA-256: bab457cbb1703796a95b7c03915472557f08bed810514327a00d2de3a2c6b562
150 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 a "link farm" designed to manipulate search engine results. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though heavily corrupted, contains the URL that triggered the malicious redirector heuristic, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=coleman+220j+lantern+manual
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/tukenorisewiduvob.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/acuerdo_286_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/case_1660_combine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/0069/0848/files/absceso_en_la_piel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0434/6894/7616/files/xexagit.pdf
    • https://static.usrfiles.com/ugd/87fdc7_69ca148e211549639962c8df1e3a1c47.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ae2582386cf4e27979301d401409196.pdf
    • https://static.usrfiles.com/ugd/74a852_297b03a48e6f498e8f104fa9a87afc97.pdf
    • https://static.usrfiles.com/ugd/cdb50c_05b75c3635774372b8ddfa80a6c57b8d.pdf
    • https://static.usrfiles.com/ugd/a44510_561f9c343c634245bfc01c9d3b8b53d4.pdf
    • https://static.usrfiles.com/ugd/97493d_21909f3ac75446a0abeecea61a746c0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf26840b3271456e9800660efd4b4d8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5574c7fe00f477faa1efd1a6bed1a3b.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_off00004fb0.bin
dbad9a2fd0351e0fe729405f9e6fa889c60e270323677b2200581ccc5bfd0eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB0 4908 bytes
font_01_sfnt_off00006045.bin
ca94b9d6c694a8555ddd39b901e982a34152a76aa87f9ea72a57286f1ead8bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6045 10420 bytes

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