Malicious PDF — malware analysis report

Static analysis result for SHA-256 52080ae0c955a3e2…

MALICIOUS

PDF

41.4 KB Created: 2020-08-14 10:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 401417baa177b29d09056e6ce36f4fbc SHA-1: d5b2995660b67bb2b54f6eab56db5aa430a876ef SHA-256: 52080ae0c955a3e28a898e1666ec1918fed444d63ab843805eebd353940d340d
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL. The presence of a "download button" heuristic further supports the lure-based attack pattern. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chromebook+apps+vs+android+apps In PDF document text
    • http://files.kscoastie.net/uploads/1/3/2/7/132712514/debuzu.pdfIn PDF document text
    • http://files.roanokecommunityco-op.org/uploads/1/3/2/7/132740978/7457488.pdfIn PDF document text
    • http://files.drbeccasbackyardbiology.com/uploads/1/3/1/0/131071072/vewotelas-lomenufusebo.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/1/0429/4557/7116/files/98851028097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/cervicalgia_que_es.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/78860641922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/zitudojura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/random_numbers_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/44342491822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/by_laws_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1269/1867/files/dabimulukavufulawulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/diferena_entre_infeco_bacteriana_e_viral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/relagurizafupekiwiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/nogerunesosuxusi.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 4

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_off000064d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D5 5336 bytes
SHA-256: 19c99a81c6ac43e5a855c437496f0b200b6b226cdc829988e35af3a55151a619
font_01_sfnt_off000076cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 9984 bytes
SHA-256: c537c593ae5ea985277ecc0494f6645d5ae568c6b3ef36be17c5d8f7888ca087

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