Malicious PDF — malware analysis report

Static analysis result for SHA-256 686dc8f6a6a67072…

MALICIOUS

PDF

41.1 KB Created: 2020-08-11 15:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00ba068a83f42bbce75227c9da0015b1 SHA-1: 4de118178f87bb6002ba745678d55356deccfb19 SHA-256: 686dc8f6a6a6707283607bea2145e5095e76c80934b6bcded8a0e61b44da720d
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body also contains the primary redirector URL, suggesting a lure to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and link farm heuristics indicate a malicious intent to redirect users to potentially harmful 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.com/wb?keyword=teknik%20vertical%20rescue%20pdf In PDF document text
    • http://files.megtinsleymft.com/uploads/1/3/1/6/131607467/misejasuno_movaza_situmi_jaguwila.pdfIn PDF document text
    • http://files.mastudentnurses.com/uploads/1/3/0/7/130776607/nokogajowabobekexu.pdfIn PDF document text
    • http://files.music.shenfieldlearning.com/uploads/1/3/1/4/131452804/supikimoniv.pdfIn PDF document text
    • http://xufeposit.writeindanderyd.com/uploads/1/3/0/7/130776445/4673561.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/1/0434/0521/3847/files/17072040473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/conjunctions_english_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3693/7125/files/sad_song_2014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/sedusafirizonewodelov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1612/6625/files/34698820299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/algebra_examples_with_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/vehicle_condition_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/27653133247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/hanuman_chalisa_telugu_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7249/4495/files/biriwelamupadevapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/wulenimowazeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/56934153833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3913/5643/files/malixedozegalamorepuruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4453/files/atira_housing_ahmedabad.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642B 5224 bytes
SHA-256: 4fd0a3f1ccdf9dba52239ed6539001481cacc4f4f856e56662ef9c26a7e3571d
font_01_sfnt_off000075fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FC 9808 bytes
SHA-256: b6f2e3b957a1a81584fa039fe9ebfa218789dfc10aadb3e325039e437cd903de