Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2dd531570c7fa3c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-06 16:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd5f0fe0c4aa594c7946c437d1c5ba7a SHA-1: 4d39e1255300781602727fb36d3c4304a52ebd0c SHA-256: b2dd531570c7fa3c5a3b1b40f4af78737ba54a3b5f7813fe5aec50d070645b2b
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text is heavily obfuscated and contains numerous URLs, suggesting a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted from this sample.

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=verbo+sum+latino+pdf In PDF document text
    • http://files.mattleemitchell.com/uploads/1/3/1/8/131856009/1771364.pdfIn PDF document text
    • http://files.l2flourish.org/uploads/1/3/1/4/131438059/1254889.pdfIn PDF document text
    • http://files.korahcvs.com/uploads/1/3/1/3/131379118/patelav.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/1/0433/0687/7080/files/19227598733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/opposite_words_in_english_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/84793163628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lojuxefututa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7056/files/jilakuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2996/9561/files/jilowatakaroguwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/16902432490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/56789068247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0210/1923/files/kunawoniju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/rubijinajudabob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/73195834765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29942388251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/supatad.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_off00006573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 5292 bytes
SHA-256: aa1d19dd34930d52670b0a98a4faad8929eb9b4bc42b425db5549cf799245b41
font_01_sfnt_off00007758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 10284 bytes
SHA-256: 6a5ec07e1ab9af5073d30ca85c74fe4127ba82cb4c615a9f9eecd77abd4c4222

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