Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a272c5be984aeff…

MALICIOUS

PDF

44.7 KB Created: 2020-10-12 00:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 47fc98781de4a93369c721ee0880883a SHA-1: ffa349c91b6339c315eda63da67b6fa54c499784 SHA-256: 8a272c5be984aeffe0f472cf2bd26d778b2d71c668af32e216563b249c14e46d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body and embedded links suggest a lure to a malicious site, likely for phishing or malware distribution.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=smithtown+west+high+school In PDF document text
    • https://site-1040512.mozfiles.com/files/1040512/23911920187.pdfIn PDF document text
    • https://site-1040280.mozfiles.com/files/1040280/potapef.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/zezobilomakudigefe.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/30065583250.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/musogabi.pdfIn PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/62356545054.pdfIn PDF document text
    • https://site-1038979.mozfiles.com/files/1038979/86468002925.pdfIn PDF document text
    • https://site-1040215.mozfiles.com/files/1040215/nowojelatobi.pdfIn PDF document text
    • https://site-1040977.mozfiles.com/files/1040977/jideni.pdfIn PDF document text
    • https://site-1040251.mozfiles.com/files/1040251/49378653993.pdfIn PDF document text
    • http://supefuvab.phillipsandphillipsmusic.com/uploads/1/3/0/8/130813694/jexufasawumakevatane.pdfIn PDF document text
    • http://files.studentsfortomorrow.net/uploads/1/3/1/4/131438155/a93ab764.pdfIn PDF document text
    • http://files.movedipr.org/uploads/1/3/0/7/130775845/mimagekivapofezuki.pdfIn PDF document text
    • http://files.azbroadwaykids.com/uploads/1/3/2/6/132682737/81bcb.pdfIn PDF document text
    • http://files.adec322.com/uploads/1/3/2/8/132814996/2353131.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/1/0499/8715/8166/files/epic_minecraft_builds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2743/files/magnetic_loop_antenna_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8398/8125/files/exerpeutic_1000xl_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2406/3392/files/silica_gel_chromatography_polarity.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_off000064ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 4888 bytes
SHA-256: f242d585051e6b34e738efdde4653b85a98c7476682a9361b9041de4f429c37d
font_01_sfnt_off00007550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7550 10100 bytes
SHA-256: 17d755f07040b0a9c921f5166cb1a24850f6d2c3cc121c3731a1624cb62f7840
font_02_sfnt_off000097b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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