Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6db546d2223c0ad…

MALICIOUS

PDF

43.0 KB Created: 2020-09-17 10:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02680617d5c17fa5a981f9e239d16a3a SHA-1: 60beac4b5437484f6f596df31779ba447da30fa8 SHA-256: b6db546d2223c0ad045484d609fe7a01653762f2bab4a957816abc7b50d6f003
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are consistent with this link farm behavior. The primary attack pattern involves leveraging these links for malicious purposes, potentially SEO manipulation or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/wix?keyword=exponential+function+worksheet+kuta In PDF document text
    • http://files.snowstorm-artstudio.com/uploads/1/3/0/8/130873984/1874242a87ccff.pdfIn PDF document text
    • http://files.alisonjassoc.com/uploads/1/3/0/8/130813931/650e76db.pdfIn PDF document text
    • http://files.mi928.com/uploads/1/3/0/7/130776406/835183.pdfIn PDF document text
    • http://vazuwixer.eluniteddivetravel.com/uploads/1/3/1/8/131857363/joranol_nofejup_pinufafixixu_kuwoso.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://99b71f00-24ad-420f-8b38-863735ad5781.filesusr.com/ugd/50de67_0101e514299741a5babff7a05d25769b.pdf?index=trueIn PDF document text
    • https://772ce74b-1199-436b-8f7f-0c4a7fdb5374.filesusr.com/ugd/61567a_a06f6ed745224860807a0a267ab978dc.pdf?index=trueIn PDF document text
    • https://f1c3a2f7-a9aa-48a4-9a76-baae6e41bcee.filesusr.com/ugd/d2751c_9e242dc7472b4843aa0954546b13d817.pdf?index=trueIn PDF document text
    • https://a3563421-6ef2-4d07-a964-4e86a5d986a8.filesusr.com/ugd/429b25_c849834cc2a14146adc79eba39c90664.pdf?index=trueIn PDF document text
    • https://f3e0c5ea-d6b4-4288-af3d-57876f54281e.filesusr.com/ugd/dcf311_a2a94dcdc56c4cc1bf455e9bae1ed296.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/56900863458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/vunirenarejigunudefote.pdfIn PDF document text
    • https://2b2fdc7b-fd4c-45d1-86fc-d2a6a9a619c5.filesusr.com/ugd/33a16d_62bc7adeba1a4c4c967826344641d902.pdf?index=trueIn PDF document text
    • https://230034a8-0535-4825-a734-7fb1ba8bb298.filesusr.com/ugd/10cedf_59860edf78cf40eba0abe2b9fd439264.pdf?index=trueIn PDF document text
    • https://acee0fb9-ff88-4b5c-a8af-c71eb647ead5.filesusr.com/ugd/6203b9_e277537e72f84d168683aece7e1a4a9b.pdf?index=trueIn 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_off00005a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3F 4116 bytes
SHA-256: 2b684bb31666e24f7ce3fef68692624bdb1a0a0158547aad55675331c339fbfd
font_01_sfnt_off0000695a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695A 5284 bytes
SHA-256: fc6942aa3f39431b8c3d03bd393ebc2c129ee7a128d185965959e551a9c145b1
font_02_sfnt_off00007b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6C 10304 bytes
SHA-256: 8373e95fb2ceae6a2d6af125f03a236e4d6853a315c93f592d71dde7119b0ee1