Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e38d2db28731e3…

MALICIOUS

PDF

44.6 KB Created: 2020-08-09 17:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e1491dbc42243faaec1859d78180798a SHA-1: c6e6333ce96169e79b8db704d1ffcd5864dcd3fa SHA-256: d0e38d2db28731e3acc28b0478a30ad7d7c7b41e1e347456d1971508b202487e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though obfuscated, contains text related to academic PDFs and the malicious URL. This suggests a phishing or SEO poisoning attack where users are lured to malicious sites under the guise of downloading academic materials. No scripts were extracted, limiting the analysis of further execution chains.

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=mathematical+statistics+with+resampling+and+r+pdf In PDF document text
    • http://files.freedomdolphindiving.com/uploads/1/3/2/6/132680994/244417b38e2a6.pdfIn PDF document text
    • http://teval.bjustudentlife.com/uploads/1/3/2/6/132696030/d2689e5ae4c7.pdfIn PDF document text
    • http://lazizi.ljdixon.com/uploads/1/3/0/9/130969656/4697858.pdfIn PDF document text
    • http://nigobo.wickedchillplymouth.com/uploads/1/3/1/6/131636855/5762857.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/1/0428/5346/6271/files/81737927149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/ansi_ashrae_standard_55.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/fidijadoseze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/57258535929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8022/4663/files/adsorption_physical_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/sotetafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0301/0468/files/wepinedoboguse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4438/7481/files/cider_house_rules_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/mathematical_programming_steven_vajda.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000717d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717D 5668 bytes
SHA-256: 75fb3a1fee810aa0641a96d294163c4db619846346b5769d141e189a4de0e27a
font_01_sfnt_off000084b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B8 9480 bytes
SHA-256: 909e955ccc6de8d8a6f14acfb9d3b2dbca570d2e1f73deb18cc0758bb6c326d4

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