Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f39057ed6f0efe…

MALICIOUS

PDF

42.6 KB Created: 2020-08-10 00:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebaa190300a2776d0e65978f6a9d9943 SHA-1: 3024773e4e784cb53c395b070425477762b193d4 SHA-256: 71f39057ed6f0efe7090982501e00448d327205b0422c38a3741ce26cc38609d
154 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is identified as malicious by ML classifiers and heuristics. It links to a redirector URL which is part of a link farm, suggesting a phishing or scam attempt. The document body, though partially corrupted, contains text related to 'Energy Australia price fact sheet', indicating a lure. The presence of numerous external PDF links further supports the link farm heuristic.

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/pify?keyword=energy+australia+price+fact+sheet+2020+pdf
    • http://files.sunwestpebl.ca/uploads/1/3/2/6/132681976/teweniduxon-wojikawumijuv-xesimuka.pdf
    • http://files.houseboathowrah.com/uploads/1/3/0/8/130814682/2768054.pdf
    • http://files.kenziemack.com/uploads/1/3/1/4/131438464/9176425.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/zifusaviluso.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/40802045980.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/76490223602.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4454/files/18385055361.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/bncc_atualizada_resumo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/romanticism_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/hatteras_harbor_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/13587207830.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/66325131422.pdf
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/passive_causative_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/16874957655.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/kemixonerigosuxevadiz.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_off0000667c.bin
edeef7e2ffe498dbe3c45c64514fc1b7a0a98d83ba425c9812c912e33b122d0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667C 5748 bytes
font_01_sfnt_off00007a1a.bin
27a54eb41f197c91767ec53d965955858c395c0953fb2330cb08fe61936d48e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1A 10416 bytes

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