Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e4f41856b5e944…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 13:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb0813c61163d1e59d7860a7333c8d30 SHA-1: 28c8b97d01df61d0762be414908fbf3aa7d9f56b SHA-256: 14e4f41856b5e94490769d6d6105ec8345889cff83ff94b3287e5c33c70c74e3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document's content, though obfuscated, appears to be a lure for academic-related content, aiming to trick users into clicking these links. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports this assessment.

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.cc/wb?keyword=library%20of%20congress%20classification%20example%20pdf In PDF document text
    • http://files.stefczaksgreenhouse.com/uploads/1/3/2/6/132681579/937705734dbf.pdfIn PDF document text
    • http://nuseri.embracingonesoulatatime.net/uploads/1/3/0/8/130814328/xokixikososalad.pdfIn PDF document text
    • http://files.joinerystudio.com/uploads/1/3/1/3/131380889/5763458.pdfIn PDF document text
    • http://files.keepitmovinginc.org/uploads/1/3/2/6/132683292/5561538.pdfIn PDF document text
    • http://files.tworock4h.com/uploads/1/3/0/7/130776728/povefadavagajofugeb.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/1/0431/2032/8864/files/90618861429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1137/9097/files/rumogenarafowasezojitelus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/40177681649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/31254662001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/23229179912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/11517134123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/biology_chapter_wise_questions_for_neet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/32565991546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/capitalismo_selvagem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/arkabutla_lake_map.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_off00006712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6712 5512 bytes
SHA-256: bc075b8cb48a2911d4700a9f0b190e0a9bdb09cd10112535ebfac86a1baeac8b
font_01_sfnt_off000079b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B9 9908 bytes
SHA-256: ec4ac91049aeda3d2abae25e5af57ed5a260c9ada27d61b487fcc9cfdb1eb8ef
font_02_sfnt_off00009b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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