Malicious PDF — malware analysis report

Static analysis result for SHA-256 8391a022ca8bd39b…

MALICIOUS

PDF

47.8 KB Created: 2020-08-24 04:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f35f0e71f49ea7bac08a06532d28af2 SHA-1: 510ae0553c4adc2882c51189326fb20e79d11a0e SHA-256: 8391a022ca8bd39bba5f9e8ec85b4909554fe754473fcf5a5b4cc3539f244113
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, contains a URL that is also present in the heuristics, indicating a likely phishing or scam attempt to redirect users to malicious content. The presence of multiple external PDF links suggests a link farm designed to distribute malware or phish for credentials.

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/pify?keyword=bus+stop+movie+naa+songs In PDF document text
    • http://files.hogwashfarm.com/uploads/1/3/1/4/131407247/kepuvisizesopikowozu.pdfIn PDF document text
    • http://files.cobusinessadvisors.com/uploads/1/3/1/0/131070115/e9ea4914fa6d.pdfIn PDF document text
    • http://files.buildingbrilliantmindsonline.com/uploads/1/3/1/0/131069879/ad2ad83.pdfIn PDF document text
    • http://files.fpcchurch.org/uploads/1/3/0/7/130740149/8b3d70341.pdfIn PDF document text
    • http://files.discerningheartsministry.net/uploads/1/3/0/7/130775544/5926698.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/1/0430/6698/2561/files/xanadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/gdpr_article_15_response_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/vevefonoduwaxed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/mofotodasowejavifoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/4671822081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/78081044151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0553/3598/files/59189848834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/rujatereboluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/12427777918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0419/8038/files/6th_grade_math_module_3_answer_key.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 8

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_off00007175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 5120 bytes
SHA-256: 2bfa2b03405813a7715c51bc01437321d65b5cef4c501556ccddfbc3f8142e62
font_01_sfnt_off000082df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 14640 bytes
SHA-256: eaf698fdefaed594eba9f94bb44a244d4f7b6556ddff02507d2d87b17d4111d6

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