Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee7bcbed4aad732…

MALICIOUS

PDF

36.5 KB Created: 2020-07-08 20:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 341277b9ed54dc7c47f4b804a5187852 SHA-1: a64b07310c31ca587b6117ed309b208136bd2bc5 SHA-256: 3ee7bcbed4aad732ad66aec789c99e280e837596c87f3a27ccf956ba8e04679e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, including a redirector link to 'ttraff.cc' and a large number of links to PDF files hosted on various domains. This indicates a link farm or redirection strategy designed to lead users to malicious content. The document body, while containing garbled text, also includes the 'Antonyms word search worksheet' lure and the primary malicious URL, reinforcing the phishing pretext.

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=antonyms%20word%20search%20worksheet
    • http://files.bossmanart.com/uploads/1/3/1/0/131070521/7bd11.pdf
    • http://files.topshedidaho.com/uploads/1/3/1/4/131407823/dixesebasafefafu.pdf
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/3/131379434/94345039.pdf
    • http://files.chardoncommunityactionteam.org/uploads/1/3/1/3/131384018/pugotut-newifuniz.pdf
    • http://files.snydersbuildings.com/uploads/1/3/1/4/131438439/somomaluvuduganojog.pdf
    • http://files.camera1.ca/uploads/1/3/1/3/131380413/pizixejawij.pdf
    • http://files.peakhealthcaremaryland.com/uploads/1/3/1/4/131406816/rizapisopasiraluzoga.pdf
    • http://files.farmacybotanical.com/uploads/1/3/2/3/132302973/xutitogesafa-lixoreriberexik-larowuwonubola.pdf
    • http://files.doylestcafe.com/uploads/1/3/1/0/131070112/lifuxum-jupevibubebigo-zedew-menefa.pdf
    • https://jadunaveliwu.files.wordpress.com/2020/06/5153840481.pdf
    • https://gemevitev.files.wordpress.com/2020/06/vokuxilakamegilixile.pdf
    • https://kofimefek.files.wordpress.com/2020/07/vixif.pdf
    • https://vokizowonaso.files.wordpress.com/2020/06/suluxali.pdf
    • https://womotisuxapo.files.wordpress.com/2020/07/rikigoxofulajedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.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_off00005376.bin
a01896a0a0fa104e6274c5d2e9d7456554f0a251d454a01942a1eab972278ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5376 5132 bytes
font_01_sfnt_off000064c7.bin
87839584a262ffa48fef8fae3595b51aca8e3d1aef97e0b0532bcc50654d703d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C7 9500 bytes

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