Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1321f9f9eaac7dd…

MALICIOUS

PDF

44.0 KB Created: 2020-08-29 03:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028eb7fd783b12b6e12f5324a7ab8740 SHA-1: 8e2b649765a4d678c9b64270f5a04a45d1dd9c6f SHA-256: d1321f9f9eaac7dd9141345c20c9d0c596c0547e7e9c582f41c451c56db91b52
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The PDF also contains a mass external link farm, indicating a potential SEO poisoning or link farm attack. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector is a high-confidence indicator of 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=verizon+fios+guide+channel
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/20981295316.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/1267198708.pdf
    • https://cdn.shopify.com/s/files/1/0435/7121/6542/files/43671955269.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42228357160.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/60162013677.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/neliligetut.pdf
    • https://static.usrfiles.com/ugd/b8c837_471ef8e33f964ebba8d3aa96f8b02e83.pdf
    • https://static.usrfiles.com/ugd/b8c837_41d1bf9c978849ec92d2b207e79f9dbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f4329fbca514f19b89026caab24482f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bba919c11bb14f9694b66fad55a6b759.pdf
    • https://static.usrfiles.com/ugd/b8c837_f869c9e6f1204f20bb41cb2ded25ac0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2f8ee6dcc2042408a592ecaf12b1995.pdf
    • https://static.usrfiles.com/ugd/b8c837_286e98460dea49649cd398d76478a1db.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_off00006daf.bin
f23bb2fc5459e0abccc4053ca7c11769fe7ad13da707b2a9219ea8a11f7b1896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 5300 bytes
font_01_sfnt_off00007fb5.bin
976cbe0f84bd1f9194df45c564aa050342b643ee29d29c9d22bf9b570d0bdd56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB5 10476 bytes

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