Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb51895ade84565…

MALICIOUS

PDF

41.6 KB Created: 2020-07-10 11:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e066989be24f0d9e32853fbb458491d SHA-1: 574c85cb3cc21db01cf80b5fb97dc2ed132ef3c2 SHA-256: acb51895ade84565c99fdbc521ae9482ac22b42316d51e2a81d36efaabb08ddc
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a PDF SEO link farm. One critical heuristic indicates a link to known malicious redirector infrastructure. The document body itself contains a mix of seemingly random text and URLs, reinforcing the malicious redirection and SEO spam intent. No scripts were extracted from this sample.

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.ru/wb?keyword=christian%20hermeticism%20pdf In PDF document text
    • http://files.celinedionweloveyou.com/uploads/1/3/1/8/131856356/visuvibekowuborup.pdfIn PDF document text
    • http://files.jackiedeephotography.com/uploads/1/3/1/1/131163953/sefofejos.pdfIn PDF document text
    • http://files.hsc3knives.com/uploads/1/3/0/9/130969243/a00465f049b.pdfIn PDF document text
    • http://files.nrisa.org/uploads/1/3/1/4/131408528/tojekef.pdfIn PDF document text
    • http://files.pccyorktown.com/uploads/1/3/1/6/131606429/zubidelikigil_kilozejepatabu_dowifuz.pdfIn PDF document text
    • http://files.reneegiblin.com/uploads/1/3/1/8/131856950/fff120.pdfIn PDF document text
    • http://files.ohayosensei.com/uploads/1/3/1/6/131606465/8363773.pdfIn PDF document text
    • http://files.healingisappealing.com/uploads/1/3/1/4/131437603/xetukibakizez_jupoxevika_gopikubagifopo.pdfIn PDF document text
    • http://files.the365church.com/uploads/1/3/2/7/132740618/fafelaxukojawobig.pdfIn PDF document text
    • http://files.getitwright.com/uploads/1/3/0/7/130776788/pufim-fafopunatobi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://magatefijom.files.wordpress.com/2020/06/nanipugurowodol.pdfIn PDF document text
    • https://wakatox.files.wordpress.com/2020/06/9685107547.pdfIn PDF document text
    • https://milinubed.files.wordpress.com/2020/06/8827501062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kusamusa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 5064 bytes
SHA-256: 01c8b2e251bf038dbe14630b0cbe8fbcdcdec59aa9407016a6cc43cf5b929fa0
font_01_sfnt_off0000775a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 10076 bytes
SHA-256: 828d9f132206c768619f6c179cec79cf01beeb8709bd7beb60c6aa8964954cf8

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