Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e0b7db7801fde9…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 17:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 34d4ae558ebf29153cb021f70fa26bf3 SHA-1: 3a0a73de033ce7bad57d39956fb4213b5fbad681 SHA-256: 21e0b7db7801fde9d13679a42fe4ffa89c9a178cd1cc25448ac6253d948beaf0
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a menu and PDF conversion tools, likely serving as a lure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary goal is to drive traffic to potentially 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.
  • 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=brewingz+menu+pdf In PDF document text
    • http://files.rsmpdsg.com/uploads/1/3/1/4/131406714/8891743.pdfIn PDF document text
    • http://vileg.ethiopianvillageschools.com/uploads/1/3/0/8/130814058/gesawusilozulipa.pdfIn PDF document text
    • http://files.setfreecoaching.com/uploads/1/3/1/4/131454052/2388088.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/1/0437/9715/1904/files/pdf_to_word_converter_editable_mode_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/wopawatafadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/nikivinesero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/zaxelumaresaxexovasuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7407/files/diravebez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/47665374071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/19789197025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4815/5806/files/rains_of_castamere_violin_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/wubetipuragevop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5271/1582/files/vasedapigewedot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mituvazejuremoposanizama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9196/7652/files/sukoledokulasefamuvafa.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 3

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_off00006e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E94 5132 bytes
SHA-256: 40d9d17085f6eb4aa5977e1c8c0438601dad7efa61c657946205528b785e998d
font_01_sfnt_off00008019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8019 10652 bytes
SHA-256: 056ab95a07727787bb3d96ee720e4646b1efafcf67ec05497e9c76c653ca3b9d

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