Malicious PDF — malware analysis report

Static analysis result for SHA-256 445926a499f978f2…

MALICIOUS

PDF

43.6 KB Created: 2020-08-21 13:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e67f722ccfd4e7794178d4f455a5cb3c SHA-1: 32a705e1e349ab2937355ce6ad948147b234607b SHA-256: 445926a499f978f2c1a94005bb2c95dde313284218972ad15f0c8918f64fa502
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body did not provide further context beyond the embedded URLs.

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=benedetto+croce+ariosto+pdf In PDF document text
    • http://files.kristabelanger.com/uploads/1/3/1/3/131382955/kuwip.pdfIn PDF document text
    • http://dazer.seislagos.org/uploads/1/3/0/7/130775136/9504171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/79787089443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/cambridge_test_a2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/32072834909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/60523461870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/java_color_class.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5027/7791/files/biriyani_movie_songs_free_tamilwire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8779/7155/files/astronomy_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/28433716742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/fun_6th_grade_math_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/cartoon_ki_picture_video.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5C 4952 bytes
SHA-256: 492198c3bcac48857352fb07e106fa60c1d3ec9632e70cdae9663524b1dd289b
font_01_sfnt_off00006e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 11076 bytes
SHA-256: 6d1f9b259d0fb157c8a763f52a62814818e9614ba07ec8a130c4a15e24efa01e
font_02_sfnt_off00009233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9233 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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