Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc33ea66923b5e9…

MALICIOUS

PDF

52.4 KB Created: 2020-08-12 18:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c28e70b5b2e131156dbf38ffeec31751 SHA-1: 36432e3fbfd4ccb91e80ba5d429b323ef4c30e46 SHA-256: 6fc33ea66923b5e9a7bfd325cb977f5b550708e5e0e6be03124eb339dc7243ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to religious text, likely to trick users into clicking the malicious link. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=qaseeda+e+burda+shareef+pdf
    • http://files.downingmsband.com/uploads/1/3/1/1/131164270/noxizuxawoduben.pdf
    • http://bukawox.cateringbykatherine.com/uploads/1/3/0/7/130740013/2fe83b47679a.pdf
    • http://files.arfstrom.net/uploads/1/3/2/7/132740172/4882573.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/4921693609.pdf
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/57386934302.pdf
    • https://cdn.shopify.com/s/files/1/0429/6998/9279/files/vegilenuraj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/pekafafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/15162851450.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/52728452255.pdf
    • https://cdn.shopify.com/s/files/1/0433/3263/2730/files/kizugulogajosuxixiwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1057/9865/files/54998797381.pdf
    • https://cdn.shopify.com/s/files/1/0446/7530/1539/files/osborn_s_brain_imaging_pathology_and_anatomy_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/vepazel.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/meguxi.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009f5f.bin
ad5631a91189821f459b16fd87885baa69311a8b16f58663829709898efe66fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9F5F 21440 bytes
font_00_sfnt_off000069bf.bin
efa3381c6f66be05c478efef0016b32507121016d31eaffcfba87ff7a336aaba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BF 5300 bytes
font_01_sfnt_off00007bb0.bin
be03c76a1e12458236ea09e8b6e7b0fca4a3510fdf284dfb65849841977567d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB0 10572 bytes

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