Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff13c132026b6c74…

MALICIOUS

PDF

65.7 KB Created: 2020-09-10 18:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bca45de5e5558c33c034e87924935c0 SHA-1: d1a89e2fb9ac87c5adbd28bfa583ce11be4b6afa SHA-256: ff13c132026b6c7474f8cd94ad61ab6150093e8f1e2ab24ab69e36f54a35321c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO poisoning. One critical heuristic identified a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=litterature+africaine+negritude+pdf', which is also flagged as malicious. This indicates a social engineering attempt to trick users into clicking a link that leads to malicious infrastructure.

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.link/wix?keyword=litterature+africaine+negritude+pdf
    • http://files.lyndhurstarttrail.com/uploads/1/3/0/7/130739265/07c0e3b3e3ec10c.pdf
    • http://files.twelvelittletales.com/uploads/1/3/1/4/131455956/tulun.pdf
    • http://sugelod.biking4life.org/uploads/1/3/0/9/130969352/dusawozapanax.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/lodgement_ref_answer_5.pdf
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/28613219500.pdf
    • https://cdn.shopify.com/s/files/1/0432/7299/4979/files/19971916832.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/bernie_s_green_new_deal.pdf
    • https://static.usrfiles.com/ugd/bca722_4949b87793bd454592b3539be9cae8c1.pdf
    • https://static.usrfiles.com/ugd/a107db_f2e4c5c079eb440fae093a36ab7a11f3.pdf
    • https://static.usrfiles.com/ugd/affb4a_4ed6d1156f844c70bc291365703969b5.pdf
    • https://static.usrfiles.com/ugd/f515ca_36f3413f23bc421cacdf572e8682f14c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f035f8eec18649eebf6ec9c77deffc04.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_off0000c560.bin
ee3582feaef237f529146f80824b661870ff840a092110ec44ec2b89a58182eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC560 5052 bytes
font_01_sfnt_off0000d6ab.bin
8806704da9fd2c980c9bc9f29a9ea0f97a20bc44753e4e01ca53fd4845c5ac93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AB 10312 bytes

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