Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6de5ff246da43e4…

MALICIOUS

PDF

39.7 KB Created: 2020-07-27 11:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7bc01a300eecab1192958b0b65615ab SHA-1: 2443745e6fc701b1878a290e990d35bbd6516755 SHA-256: d6de5ff246da43e4cff70a4608f2e73add82ca83ac59a3d6232fddd8c8a0cf5d
154 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 lead users to malicious content. The document body, though heavily obfuscated, suggests a lure related to 'business card template avery'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking and distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=business+card+template+avery
    • http://files.meyersmagneticjewelry.com/uploads/1/3/2/6/132682829/5112008.pdf
    • http://files.freebirdcollectibles.com/uploads/1/3/2/6/132682868/4d50fb06530ca88.pdf
    • http://files.newparkclosefrc.com/uploads/1/3/1/3/131398360/b44f4d780a6ad8.pdf
    • http://files.communitysystemsfoundation.org/uploads/1/3/1/6/131636872/wapejufefadele.pdf
    • http://files.nhgahplgs.com/uploads/1/3/0/7/130739204/2285031.pdf
    • http://files.newparkclosefrc.com/uploads/1/3/1/3/131398360/b44f4d780a6ad8
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/58485553782.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/fuwasivizulufisopufib.pdf
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/74823722324.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/biwebavewu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/22879574071.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/joxisalobibekiwar.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/jikugapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/35221264404.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0117/files/pidedotomejojebuwoxexup.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/jekif.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/45716673291.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/velupofova.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/3556852469.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_off00005ddf.bin
f37d99c88e9fc3a7f148539ca86c2ef701449c76dc087e5d6020c0f94dbbfa2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDF 5204 bytes
font_01_sfnt_off00006f77.bin
320c9d0ad35a7cd334f38f73439649b881b5684dca0159f7d877e3164f2cff10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F77 9984 bytes

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