Malicious PDF — malware analysis report

Static analysis result for SHA-256 e376030013fb9313…

MALICIOUS

PDF

41.5 KB Created: 2020-08-14 07:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9eb696c86b6bffa8280819a33af05d7 SHA-1: 0a07a33bc83e0adb62429f580c9ee0edaac7121a SHA-256: e376030013fb9313ad711c3fecf52cdc2940ad3ade716654ea9c392615ec3c8d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=wolfgang%20puck%20mini%20rice%20cooker%20recipes%20pdf'. Additionally, it features a PDF link farm with numerous links to Shopify-hosted PDFs, suggesting a tactic to distribute malicious content or manipulate search engine results. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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/wb?keyword=wolfgang%20puck%20mini%20rice%20cooker%20recipes%20pdf
    • http://files.visualconceptspsg.com/uploads/1/3/0/8/130873893/guwozaberegugor.pdf
    • http://lotobeve.karenlippymosaics.com/uploads/1/3/0/7/130776485/nebodixosisop.pdf
    • http://zudix.yottaearthhome.com/uploads/1/3/2/6/132696398/0c36cab1ab8ec.pdf
    • http://sikazex.farleycameronart.com/uploads/1/3/1/3/131383791/sulef.pdf
    • http://files.perthparish.org/uploads/1/3/0/7/130739564/jexilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9990/5429/files/51827532871.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5829/files/zedumezakajavedevevefi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/bakirixivowivevomera.pdf
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/81459610589.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/jofirolesikusupobareze.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/99611574968.pdf
    • https://cdn.shopify.com/s/files/1/0440/2996/8534/files/recurrent_and_capital_expenditure.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/kilojojabakinenel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6317/2502/files/50449994997.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/xuxifamajilowimexisil.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/autocad_map_3d_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/jipasojukeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/men_in_black_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/d_d_ua.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.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_off0000628f.bin
5cccb6c080af1555fcd1f01583664b6c8f1d559b4943b5843297e9d5c952858f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 5552 bytes
font_01_sfnt_off00007570.bin
c855b53937ec15bb2fb3ff8187b2c37200495ef4ecc2abd328f7d212919166cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7570 10120 bytes

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