Malicious PDF — malware analysis report

Static analysis result for SHA-256 58edda3c394c41d2…

MALICIOUS

PDF

45.4 KB Created: 2020-08-26 23:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c9fece367ee34be0c6f350cf8ec221a SHA-1: e2eba6ba4834d459972a35a67a96b72ad28e573f SHA-256: 58edda3c394c41d24cabc26f5565abb3f2b1e0c8a4392490bdae588a1a125201
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, many of which point to external PDF files hosted on various domains. One critical heuristic indicates a malicious redirector link to 'ttraff.com', which is likely used to obscure the final malicious destination. The document body and embedded links suggest a lure related to downloading a specific textbook, 'Brock biology of microorganisms 14th edition pdf'. 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.com/pify?keyword=brock+biology+of+microorganisms+14th+edition+pdf In PDF document text
    • http://defeve.webdesignin48hours.com/uploads/1/3/0/7/130739616/6951752.pdfIn PDF document text
    • http://nijuri.sewchicinteriors.com/uploads/1/3/0/8/130813528/1910382.pdfIn PDF document text
    • http://files.campdogginit.com/uploads/1/3/2/7/132740982/visoxiregeremek_povubif.pdfIn PDF document text
    • http://weperemad.macherieparties.com/uploads/1/3/0/8/130813528/90811f7e27116.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/1/0430/6193/6285/files/dunijugixurorifodux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/ginatewugadizidoreregomat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/apiculture_lecture_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/kapavewofasapev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3340/3285/files/latest_tamil_melody_audio_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5089/2454/files/chennai_express_movie_in_hd_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/hack_wifi_id_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9328/5277/files/lolijijujatuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/zajejotubi.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 3

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_off00006ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF4 6064 bytes
SHA-256: 26d2a5f18830ad9320a15a8aa4716f0545f026280f80bc5a87de9189e54bb814
font_01_sfnt_off00008477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8477 10676 bytes
SHA-256: 292f1fa0b5bad8ad7b2efcc1f284d5a94497db9bdc87ea6b9546d7988ea3ca30

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