Malicious PDF — malware analysis report

Static analysis result for SHA-256 544b61feb1c29feb…

MALICIOUS

PDF

41.8 KB Created: 2020-08-02 07:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc81727444525c174895686c91382814 SHA-1: 1519b716bc65d42f627ca2dabcf84299d06dd88e SHA-256: 544b61feb1c29feb115ca01dfd987909f564caa443547765a7a8e8ceda14cfd6
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 document body text, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting an attempt to lure the user to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=follow+a+player+script In PDF document text
    • http://files.mariamountain.co.uk/uploads/1/3/2/8/132816066/jodak_sonabivatekijul_xuzeg_ponitabofigu.pdfIn PDF document text
    • http://files.angiezinserphotography.com/uploads/1/3/0/7/130776046/lupovalotub.pdfIn PDF document text
    • http://files.kleindesignclass.com/uploads/1/3/0/8/130874162/8054872.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/1/0430/4375/0049/files/sipudume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9489/9864/files/58032084361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/15854701556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8525/0216/files/maplestory_flames_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/biggest_cities_in_america.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/22549367237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/13381334602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/4038829919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/89727301006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4772/1892/files/gedeguwividar.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_off000066dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DC 5076 bytes
SHA-256: 5a132295b743550412cb7a6bf9fdc6027a500e04817916f7186dfc06a98a3c95
font_01_sfnt_off0000784e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x784E 9944 bytes
SHA-256: d4004f2c7a29e942862b023f99e189b1e16cb85713244904563cfa5e4fb0d81e

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