Malicious PDF — malware analysis report

Static analysis result for SHA-256 210efe4fb1b875b1…

MALICIOUS

PDF

61.9 KB Created: 2020-08-09 09:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59d5e52e88d02d2fff42ccf25f4809f5 SHA-1: 7279c8f098810a36c2173e6006eaf4607a476078 SHA-256: 210efe4fb1b875b1722a11a91badf928bdfce05ce4db81b7bb4f18f562f72989
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to 'bookkeeping for dummies' and embeds a link to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of outbound links, many hosted on Shopify. The SE_INVOICE_LURE heuristic further suggests a deceptive intent. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=bookkeeping+for+dummies+uk+pdf In PDF document text
    • http://tadak.mentalhealthaca.com/uploads/1/3/1/4/131407089/lomopevejub_nodoku_gukipuwu_falebop.pdfIn PDF document text
    • http://files.sailingwildhorses.com/uploads/1/3/2/7/132740361/493842.pdfIn PDF document text
    • http://files.joyfulnoisepreschoolsandy.com/uploads/1/3/0/8/130813768/595cf7d.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/1/0430/8018/8058/files/expedition_to_the_barrier_peaks_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/architectural_working_drawings_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53981477141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/81328234707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/benevolent_fund_form_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/fewemujubufifuxoritimem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/bible_book_in_urdu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9259/files/bushido_the_warrior_s_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/6166970292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/gututejobujonefonoxibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6408/0024/files/checkmate_cessna_172p_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4225/7561/files/sass_7-_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/1508249670.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_off0000b55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB55A 5232 bytes
SHA-256: f74ce2e6386fd0911bf09330d9b94b3046b34614d9089973b52403fd1a4d16c3
font_01_sfnt_off0000c727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC727 10472 bytes
SHA-256: 949216b7fa80520fab774fbc0c94f20f6682994a0cbc482a60e5a6169c95e49c

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