Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca464f9a2a0f6b0b…

MALICIOUS

PDF

44.5 KB Created: 2020-10-11 08:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a2df64a6579ce313989854cceea46931 SHA-1: 330d5b3b8fdd2b6a60c29d77e43778ef3d99b059 SHA-256: ca464f9a2a0f6b0b68857ba0e45923abc02a13161dd513c7a2b95c8b2d65d027
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or phishing lure, aiming to redirect users to malicious sites.

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/pify?keyword=miley+cyrus+breakout In PDF document text
    • https://site-1043204.mozfiles.com/files/1043204/muwonipifugujagikinuji.pdfIn PDF document text
    • https://site-1037920.mozfiles.com/files/1037920/sabivugutikuli.pdfIn PDF document text
    • https://site-1036826.mozfiles.com/files/1036826/43255211540.pdfIn PDF document text
    • http://gubapin.ascendingstarreiki.com/uploads/1/3/1/6/131637352/nemilesaduf.pdfIn PDF document text
    • http://files.cilldarasouthboard.com/uploads/1/3/2/3/132302944/fofumati.pdfIn PDF document text
    • http://files.lisaglauer.com/uploads/1/3/0/7/130739052/1269297.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/27629843926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8494/9920/files/venn_diagram_3_circles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7250/2425/files/96085588887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8868/8790/files/wyoming_game_and_fish_draw_results.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7019/6374/files/46625685678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/panasonic_fv-15vq5_whisperceiling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/deciduous_vs_coniferous_forest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/vutajuvavin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/four_leaf_clover_tattoo_designs.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6388 5104 bytes
SHA-256: 76a07f9bc21097dd6c697c9aa20cad630f88f3c80eba713c7352dc62c8d43dac
font_01_sfnt_off000074f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F6 3368 bytes
SHA-256: 7dc944ce70f982415020ffbeea6b90cb2d50a8eeb4e26d888e3bacb458fe87ab
font_02_sfnt_off0000826f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826F 10156 bytes
SHA-256: 917705b9415ca82ce63fae6917bd853c4b21bb2a55184825d38781786afda40d

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