Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a1938aee61f0f5…

MALICIOUS

PDF

36.7 KB Created: 2020-08-22 08:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75839e54a9cfdcd4e5def178c889c326 SHA-1: 4fb0924c8e48ac77a8efaf9342b12172ed6e37f3 SHA-256: b4a1938aee61f0f5f226de5b3f203860cfe064e276f6354c223e969d97ee5cff
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.com/pify?keyword=wavepad+pro+apk+uptodown', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to software and a URL similar to the malicious redirector, suggesting a lure to download or access potentially harmful content.

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=wavepad+pro+apk+uptodown In PDF document text
    • http://xowuwu.jingyouecon.com/uploads/1/3/0/7/130740206/tujokuratedexu.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/1/0440/2331/6630/files/lefikogizewewakagox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/dugerog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/13283456528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/bulugorepebapubatataden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/sezuwefujidevuwuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/21909530184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/10259051397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/75633014490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5630/0185/files/boundary_layer_theory_lecture_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6200/7710/files/bleach_episode_guide_no_fillers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1359/3499/files/52057220472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/44393126810.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000479b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x479B 4804 bytes
SHA-256: 47c273fd6e601287254bebe0383966c6d387c8a0d0ce2dfb556b804d98ac7009
font_01_sfnt_off0000580e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580E 9536 bytes
SHA-256: 7e796bcdff9a0b62b5e5a256427ff1c49ee10241ee5e472860bab5b34bd2f66f
font_02_sfnt_off0000782b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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