Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b9a559d371cbca…

MALICIOUS

PDF

52.0 KB Created: 2020-08-21 01:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 843cdc3be2f02fe74c2c81927aec41ea SHA-1: d17739588751d3a3d164a968022d601d3f44c223 SHA-256: 05b9a559d371cbca2d105748d0984acf6f91b8e5ca5918cd4c01222a3a6be7f1
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, identified as a redirector for SEO link farms. The document body, though heavily obfuscated, contains a URL that is also flagged as malicious. The ML classifier strongly indicates maliciousness, and the presence of multiple PDF link farm heuristics suggests an attempt to distribute malicious 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.ru/pify?keyword=japanese+internment+canada+worksheet In PDF document text
    • http://files.nickstvs.com/uploads/1/3/0/9/130969220/1658336.pdfIn PDF document text
    • http://files.mlabnj.com/uploads/1/3/0/8/130813639/vofamo.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/1/0430/2202/4867/files/haryana_bjp_candidate_list_2020_vidhan_sabha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/25172673269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/zujuleta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/susawetarogadat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1203/7540/files/nepiviraladogida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/bupaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/lonezufoguzer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/texazuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/motovefisaluripakud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2375/1575/files/andrzej_pozowski_alloplastyka_stawu_biodrowego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/album_songs_in_tamil_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4786/1923/files/tools_of_social_work.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_off00008ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA3 5428 bytes
SHA-256: 250a3ce79a4b6e0c6665445a80564544ef353614240e0bb9bb4fe0691aa3861a
font_01_sfnt_off0000a0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F5 10076 bytes
SHA-256: a3f6cdbf8455de8cb3204b7280d167356d85af3d8495511c6d9daacdfaadae93

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