Malicious PDF — malware analysis report

Static analysis result for SHA-256 342b3636987a903d…

MALICIOUS

PDF

36.7 KB Created: 2020-09-18 05:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 023045e53ba18e44af5a8aa01cb02432 SHA-1: 3c27ecd2a1f2a1f505849b566dcdb83b6ef47211 SHA-256: 342b3636987a903dc9ffc167461eadc326fec5c219a3bdf89298030e7de54583
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a malicious domain. This suggests an attempt to trick the user into visiting a harmful website, likely for phishing or malware distribution.

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.me/wix?keyword=photosynthesis+worksheet+fifth+grade
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/vofilo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0162/5252/files/35699216983.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21800621301.pdf
    • https://5e156e10-e168-4088-b742-a8be253ba3d0.filesusr.com/ugd/09273f_953bc298f37f4721b61dd86e14bba38f.pdf?index=true
    • https://2fd2968c-c48b-4f54-b1ec-e1d3b9358165.filesusr.com/ugd/4fb05f_a8eb2684822f4b80b56f70da6e713f5a.pdf?index=true
    • https://8dabd362-9921-4fa4-900e-6280f83f13bb.filesusr.com/ugd/c2bf0a_275974f9d8c9407ea6bf6f66abda84ab.pdf?index=true
    • https://477a196c-33b3-4c88-8113-f1675994a855.filesusr.com/ugd/2c7c49_b5f1bac581404d95ad7ae63857b1e57e.pdf?index=true
    • https://84509e96-a764-4fbb-a75c-d63874af47fa.filesusr.com/ugd/fd7405_2da2dccd856748f98aa43dff153d0cf4.pdf?index=true
    • https://86380af3-dd5e-4332-9cf3-84cb9c6efc05.filesusr.com/ugd/4c1554_e1f67df250a349d184a2b0531d123a39.pdf?index=true
    • https://cf5e1cb3-eb9c-4654-ab14-786af26157a7.filesusr.com/ugd/0fdb6d_874bf76ccfd74e8c9f55f20452fcc2dd.pdf?index=true
    • https://58869dde-deba-45d3-95f9-3369e0bd7ee6.filesusr.com/ugd/47b1e8_91ff30f197074f42ba100ed81dc77bf5.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/accordi_la_canzone_del_sole.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1871/files/android_studio_for_windows_7_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/55128060.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92399027362.pdf
    • https://cdn.shopify.com/s/files/1/0435/7770/4607/files/niselalutusawepopusosetir.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_off00005238.bin
920a5a5906b73b08d21fc9c9683ab83d0ddf48f197c6b6d83ece60e1f22ae09b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5238 5396 bytes
font_01_sfnt_off000064a5.bin
a202f311a3c3fe475c0b89812f2767315dc32dc80587570943c1586401fdba44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 9816 bytes

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