Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a6a72d72eb726c…

MALICIOUS

PDF

36.6 KB Created: 2020-09-17 07:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a35b10a4fa6e319a5c615420dfd16461 SHA-1: eab78d96a4c4b9f98455a954c0f08b32fcb4e33d SHA-256: 61a6a72d72eb726cfcd8378ae9e2b0b3fb1fefca0824bc80a1f546bd18262216
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as educational material ('Ap statistics chapter 3b test answers') that redirects to a known malicious domain. This technique is commonly used in phishing campaigns to trick users into visiting malicious sites. The presence of numerous other links to PDF files on Shopify, while some are benign, suggests a link farm intended to obscure the primary malicious redirector.

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.club/wix?keyword=ap+statistics+chapter+3b+test+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/babysitters_black_book_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/tabeximaxunetegerodela.pdf
    • https://cdn.shopify.com/s/files/1/0435/9939/7027/files/fulumezowoxejiganofadexiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/xovidadirarote.pdf
    • https://cdn.shopify.com/s/files/1/0429/1782/2620/files/vogemavatamakunonevaxak.pdf
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/use_case_diagram_for_atm_machine.pdf
    • https://cdn.shopify.com/s/files/1/0429/4357/8278/files/pafitineturofigujasikik.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/linux_server_administration_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3516/4835/files/71277187283.pdf
    • https://cdn.shopify.com/s/files/1/0439/3503/9656/files/naserupopitabugagufimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/16989190411.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6685/files/21111910420.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/64904332978.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046a7.bin
68d7225cf09cd00f3bee11031d74477c30b2f3286ff1159904426713f5fdc8e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46A7 5052 bytes
font_01_sfnt_off000057c5.bin
f40f568212831c0299edbacfaecc4cbdc062af04625568cda5af8d4019455bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C5 9376 bytes
font_02_sfnt_off000077a8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 4324 bytes

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