Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fa800075d1df17…

MALICIOUS

PDF

39.9 KB Created: 2020-08-18 15:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: acfd03a75f4895c49e0b806037b39d10 SHA-1: e306786f99d7a1874c5bbeb273827ef3cf2d666b SHA-256: 84fa800075d1df17293ec2907c02921202f786fcec62ec4cef69004b8f32ae73
162 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The ML classifier strongly indicates maliciousness, suggesting the primary goal is to redirect users to harmful sites.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.cc/pify?keyword=assamese+song++dikshu In PDF document text
    • http://files.flagstaffstemcity.com/uploads/1/3/0/8/130873840/335a3d82dc007.pdfIn PDF document text
    • http://noverabas.karamcneese.org/uploads/1/3/1/4/131407995/giverixagenaxe.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/1/0436/6237/7113/files/34070737916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/wutupewajodesed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/fonujaseredamiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/36075099585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2642/1672/files/wobazafoliluvojulexavupuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/kidusiposenisamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/86724506273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/62566718187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/cours_d_anglais_gratuit__tlcharger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/bogudijotaduwajujuwebuj.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 1

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_off00005341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5341 5164 bytes
SHA-256: 7b9ec5379742c176666bd5c2ce7c175ed4122de30791efbccf5e56b957b454a7
font_01_sfnt_off000064a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A4 14324 bytes
SHA-256: 2795e6668e587e4fbeeb7000af145310cfc196337c399d667c2263a38ee23a1c

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