Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd360ba7b62d0c6…

MALICIOUS

PDF

70.8 KB Created: 2020-10-11 02:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1474c81189b604819027223607b735cb SHA-1: f32698e5504f2b11adb915f0c8fcc50e5b8cf656 SHA-256: bcd360ba7b62d0c6f93e64b337a3691b600b50748442646732e9c31f86ef45c8
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting an attempt to distribute or redirect users to malicious content. The embedded URL 'https://ttraff.link/pify?keyword=bubble+wars+2' is a primary indicator of this malicious activity.

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.link/pify?keyword=bubble+wars+2 In PDF document text
    • https://site-1043098.mozfiles.com/files/1043098/57485918381.pdfIn PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/paxeraxemu.pdfIn PDF document text
    • https://site-1038729.mozfiles.com/files/1038729/15742416499.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0002/0130/files/nasdaq_stock_ticker_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/portrait_shading_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1572/4443/files/62239968472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/64752127315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880b0971-f447-48b9-b2ce-29f2f07ab3f7/gedamekow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6560/1959/files/the_land_of_stories_book_1_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1747/8815/files/best_buy_gopro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8204/5858/files/the_circle_dave_eggers_online_free.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_off0000cc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC84 4632 bytes
SHA-256: 5aae6468a88ad543ef3e63bffba1b7d871794631ad049cec98e86e643a2d3448
font_01_sfnt_off0000dc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC55 10548 bytes
SHA-256: 91aad8ad8574b3a3c7a7080752422008e972278756cef922d233dc92601a6ae8
font_02_sfnt_off00010057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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