Malicious PDF — malware analysis report

Static analysis result for SHA-256 af011e35acb16168…

MALICIOUS

PDF

38.5 KB Created: 2020-10-12 02:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ab2c39c95557c05e8ff722ba94b8d295 SHA-1: efe1188155febd27e1f6540f8ee124ba90836e17 SHA-256: af011e35acb16168f0a629e9ab4878d09fe9a832e805da3217c76860104d52e1
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=local+government+worksheets+2nd+grade In PDF document text
    • https://site-1040250.mozfiles.com/files/1040250/4638995314.pdfIn PDF document text
    • https://site-1039775.mozfiles.com/files/1039775/32890497624.pdfIn PDF document text
    • https://site-1037166.mozfiles.com/files/1037166/19939893872.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/98536067217.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/83516215709.pdfIn PDF document text
    • https://site-1038857.mozfiles.com/files/1038857/nowoxigutesaxolo.pdfIn PDF document text
    • https://site-1038548.mozfiles.com/files/1038548/21122754433.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/1/0499/2175/3256/files/sport_head_soccer_championship_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6109/9675/files/zigibiwenufelajazim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/bosch_dishwasher_she43_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2678/6715/files/1.1_practice_a_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/hydrocortisone_for_acne_nodules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/kingsborough_community_college_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/big_ass_gay.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57C5 5640 bytes
SHA-256: 26c26d6b3a56a463b1d9465995ef7638639be6c00133e26b5eef289ba2da801d
font_01_sfnt_off00006ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD9 10060 bytes
SHA-256: f14256acc2cd5bbcb6caefa8ce0aa6badfe1928e353999b6a0b4e7628ca69259