Malicious PDF — malware analysis report

Static analysis result for SHA-256 725b2a9d605b9721…

MALICIOUS

PDF

42.9 KB Created: 2020-08-11 08:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaf5c463f3d226e8d7fa294ad91e05ed SHA-1: 15bf4554ef6225f3f38a6da221295200080dac7d SHA-256: 725b2a9d605b97218cbc6bb0a9ec4d63f46a0963f531171b5bf8116a94bd5145
162 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=journal+ledger+cash+book+mcqs+with+answers+pdf', is identified as a malicious redirector. The document body also contains text related to "journal ledger cash book mcqs with answers pdf", suggesting a lure to encourage users to click the malicious link. The ML classifier strongly flagged this PDF as malicious.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=journal+ledger+cash+book+mcqs+with+answers+pdf
    • http://files.prooutboard.com/uploads/1/3/0/7/130775018/9dec4b1be7f0.pdf
    • http://files.teacherdallas.com/uploads/1/3/1/4/131483955/vesag-sezasadoridinaj.pdf
    • http://files.kurxma.com/uploads/1/3/0/9/130969402/galiratuweged.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/13840264808.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/xufomimipevelilefepogubow.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8616/files/topsail_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/wolonokubazajuvepitaliwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/favatu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/34228603789.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/stardew_content_patcher.pdf
    • https://cdn.shopify.com/s/files/1/0437/4822/9271/files/tuwanoxibisujufaxobe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/32296386341.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9994/files/wixapedelevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/kixonivivojusakafewip.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/remafuresolidekapibamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/21235672125.pdf
    • https://cdn.shopify.com/s/files/1/0438/9502/9915/files/xikifolo.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_off00006726.bin
f005aa520162c1ac5bb4c626368fd44565b157bf0570256dd8432ece5bb6e306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 5980 bytes
font_01_sfnt_off00007b5e.bin
a5b4199b5b8d83ff4db2753cea9616114a925d1b00af5248151a8155e6af1b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 10244 bytes

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