Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc66b9bf7082e94…

MALICIOUS

PDF

41.0 KB Created: 2020-09-01 03:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9bf78a15d7e8f955ee9933a8b257c85 SHA-1: 4eb0909a78f6a08b162df9ede04a30f0a94536b7 SHA-256: adc66b9bf7082e9423555cb5b9fb66c3bdbeced7b45f4e759a7c158a0f606f6a
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.cc/wix?keyword=annamayya+patalu+telugu+lo+ing', is identified as a malicious redirector. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly benign links.

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.cc/wix?keyword=annamayya+patalu+telugu+lo+ing
    • https://static.usrfiles.com/ugd/35e1ce_87ff6d9a5152478fa733f8b04782ebf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_09a1505ba1864445ae4780b5e3ee6aca.pdf
    • https://static.usrfiles.com/ugd/b13fd1_844fb8a291e3473c897736b901344480.pdf
    • https://static.usrfiles.com/ugd/b8c837_0852081b39c14d01beebae5b6fbdd89e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3107dfe9b730412ba74a3e62a761ee0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad930f9d705b458d8c3e80af9d8e9ac8.pdf
    • https://static.usrfiles.com/ugd/696117_7d2ec53e49c747168394c07022da68a0.pdf
    • https://static.usrfiles.com/ugd/35e1ce_ea679cd859a1410d9c23e3e7bf241d10.pdf
    • https://static.usrfiles.com/ugd/cafc24_a836bb2d2c3c404584ce79bf35579a01.pdf
    • https://static.usrfiles.com/ugd/ae15ca_b88074c3c2f845c4bf2770c652daaee6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce3a433c7964429c889da22b82d5d1e8.pdf
    • https://static.usrfiles.com/ugd/c3548c_4f3350df292749babbb14081856d1dbe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/allah_k_99_names.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/pugivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/juziselabuxugitukumoje.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_off000060f7.bin
e1fadaba85b0e1428c6bcde8a36fa91f5ddae1602cc1a5fa16fabaaf36db7d80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F7 4956 bytes
font_01_sfnt_off000071d5.bin
646125273a92826e2ac5c45a9c55eaa0995bfa1cf24091240210f6648627e2fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D5 11580 bytes

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