Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e70f5cb29303c8…

MALICIOUS

PDF

33.1 KB Created: 2020-08-01 16:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 627ec93492b6a683e6b527a9b1428af9 SHA-1: 4dc4a8079132b66f943373ceb5c7e765ac929fc1 SHA-256: b1e70f5cb29303c8f3b6c35c9d90f1411e294f439e2158d8af80f2343af51e63
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for academic papers, with the primary link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and other similar PDF links. This indicates a social engineering attempt to trick users into visiting malicious infrastructure.

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.ru/pify?keyword=principles+of+geotechnical+engineering+7th+edition+pdf In PDF document text
    • http://files.computerrepairnerds.com/uploads/1/3/0/8/130813715/kuvuna.pdfIn PDF document text
    • http://files.missouririverpaddlers.com/uploads/1/3/1/4/131407918/d90fa245bdf4c.pdfIn PDF document text
    • http://files.caricaturesbymichaelangelo.com/uploads/1/3/2/6/132681150/8166191.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/1/0432/0047/9391/files/36247984053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/30561206665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/nesufagekufalitajusazadun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/9085016581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/xuwumulebiwifivowule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/21198022264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5653/7495/files/timupizeruparirimeseja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/36084666415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/53688534065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/pavlov_channel_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/20515437480.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 5

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_off000043ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43EF 5496 bytes
SHA-256: 293733a2f25021c8edc9c1cedb0602cadab3108abed9b629990443d8799bfc03
font_01_sfnt_off0000569f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x569F 9636 bytes
SHA-256: 92e3cb31cf8ef7273eb40490c0a8d026f1b6c3131c62f6775ec570cd0c0bbfff

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