Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78212a41c03c1d0…

MALICIOUS

PDF

35.8 KB Created: 2020-08-21 00:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c44cc5c02f3fe4f2e59f5dd6667b421 SHA-1: 81e55dd4184b1e6bbd8970334a31a4fc0ae8f86b SHA-256: c78212a41c03c1d0bda82f0f8cb4c99f804a4424a1689436776a9fc1f91c9b50
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to external PDF files hosted on various domains, including a known malicious redirector. This pattern is indicative of a link farm or SEO poisoning attack, designed to either boost search rankings or lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=babul+da+vehra+song++video In PDF document text
    • http://files.amatterofinspiration.org/uploads/1/3/0/9/130969300/vimojomex_vureranuvazal_zebanisaj_netap.pdfIn PDF document text
    • http://files.sessumselementarypta.org/uploads/1/3/0/9/130969527/0e6c3b9070e9e29.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/1/0430/0180/6997/files/65730792161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2856/0547/files/33264049524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2744/6435/files/common_discord_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8127/files/sadadupiveb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/linupivatawutafikiwuledib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/babavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/0452/7514/files/kotixefivubaxavesuzuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/pedadikowevet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2366/2236/files/system_programming_assembler_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/easy_classical_piano_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/18914213322.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 4

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_off00004693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4693 5336 bytes
SHA-256: 695d93b5421a62f716e07ef41b0c0cef72de940cd072ac1d5f84c1bae593a000
font_01_sfnt_off000058aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AA 13228 bytes
SHA-256: 07f76a3ebba123fedcbff6d1bb6838539a01f61e259674ca7293eae91fc41a55

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