Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0a40f2773b4242…

MALICIOUS

PDF

39.2 KB Created: 2020-08-09 21:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c64a36b5d089be222a09b1488e33f01e SHA-1: 1ebe10e0bec3e9561a1d5edd28b07df47a2c8b0f SHA-256: 5e0a40f2773b4242d204502b0ea52be06b9622304246a55db89d0f5259b66e85
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains numerous embedded URLs, many of which are part of a link farm, and one of which is the malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the redirector link suggest an attempt to lead the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=voulez+vous+danser+grand+m%25C3%25A8re+paroles+pdf
    • http://files.strategyadt.com/uploads/1/3/1/3/131398347/a0a35a72f05.pdf
    • http://muruvuri.microtripod.com/uploads/1/3/1/3/131380213/bisevizefax.pdf
    • http://files.danthefan.co.uk/uploads/1/3/1/4/131437491/mefofujevofixatuxuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0091/2283/files/algebra_ii_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/2539/8945/files/peter_f_drucker_management.pdf
    • https://cdn.shopify.com/s/files/1/0431/0800/8090/files/tepejabisejakulutezuxizok.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/webstorm_activation_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/99960330005.pdf
    • https://cdn.shopify.com/s/files/1/0434/3899/7669/files/print_website_to_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/vuwixug.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/sap_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/tutimobogigatibadexubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/22134333306.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/jizavubosulesufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1582/2747/files/bubutalusebaxabuzenibetup.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/teas_study_manual.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005473.bin
c1aba63e8de1fbc31f111e128fda30cd2802993cb31e316bbd3a4608d08c0743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5473 5580 bytes
font_01_sfnt_off00006729.bin
cbb033d607b1c0b326cd60210eba9fce8f56161fcd31d119cee7c8b870438611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 12012 bytes

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