Malicious PDF — malware analysis report

Static analysis result for SHA-256 a210dc19625d83aa…

MALICIOUS

PDF

39.4 KB Created: 2020-08-26 10:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 13a3834ea366c547f6dd9426c4a35636 SHA-1: 46cfc59700bb3ae5a6a0bc62040c7f4416ec9350 SHA-256: a210dc19625d83aa66fb6dca50bfc3bc6c36276f32773fedc53f9972528bfa52
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, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of a large link farm suggests an attempt to distribute malicious content or phishing lures.

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.ru/pify?keyword=ucsc+cmps+112 In PDF document text
    • http://paxile.pattyspetalsgodfrey.com/uploads/1/3/2/8/132814343/vumirodazisoj.pdfIn PDF document text
    • http://files.historydbqs.com/uploads/1/3/1/1/131163613/2df583a049.pdfIn PDF document text
    • http://dosasero.cotonevineyards.com/uploads/1/3/1/0/131070374/gitigaforigije-dewafebanil.pdfIn PDF document text
    • http://files.headstrongoffroad.com/uploads/1/3/1/3/131379443/ab4dc348efe48.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/1/0429/3135/5807/files/linevoxuwekizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/camera_lenses_for_android_phones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7960/6176/files/49811493175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/tufowabof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/12468413778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/area_formula_for_shapes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/zasedanowexutel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/tumezajiwafituti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/78954241962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/dozisefovama.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 7

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_off00005ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA3 4916 bytes
SHA-256: 123537eff8f5f8596143c2db01dac857f4f0da5a78f8fd87ab68dce74716ffe3
font_01_sfnt_off00006d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D58 10420 bytes
SHA-256: 125280d500c326b48dd9cec000c6dc1be193d72eff29f0d0be3b7da001b30693

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