Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c24398846931cbc…

MALICIOUS

PDF

53.2 KB Created: 2020-08-19 01:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 170a8d1026c4dd95ec237f25064de272 SHA-1: 45bc8cf15d1813127059959fbdd68b23a0f81783 SHA-256: 8c24398846931cbc71ba33f47ee1edbd7d8372a9a9714234aa767a48e2bb82f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'best free antivirus software for android' and a URL that redirects to a malicious domain. This suggests a phishing or scam attempt to lure users to a malicious site.

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/pify?keyword=best+free+antivirus+software+for+android In PDF document text
    • http://files.lafsgraduation.com/uploads/1/3/2/6/132681513/zubesifetinel.pdfIn PDF document text
    • http://files.boatingmadeez.com/uploads/1/3/1/4/131453415/sujasugusu_palozazanaka.pdfIn PDF document text
    • http://files.mnhistoryalliance.org/uploads/1/3/1/4/131406348/67b3f3.pdfIn PDF document text
    • http://files.charlesmuwonge.com/uploads/1/3/2/6/132681749/fazuxutakelalodamuje.pdfIn PDF document text
    • http://ninafoli.furnacebrook.org/uploads/1/3/0/8/130815017/gukaferikafunem.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/1/0437/7378/8321/files/kupiselijapopotivopirewoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/gepugopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/8805641408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7063/5676/files/29319590667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0944/9884/files/75275981861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/62240095345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/junigegipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6651/3818/files/archie_comics_collection_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/jebato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6613/0593/files/final_fantasy_9_wiki_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/fuwozuwixikeluvivusuget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/66733881787.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 7

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_off00009350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9350 5068 bytes
SHA-256: eb64dd7d5b800c162e28e26af82cc6d5bcab0ce551d501d3f09ba85cd4ba515e
font_01_sfnt_off0000a4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B8 10288 bytes
SHA-256: 2985853fcd8b63c1d80622c2283b64b9455769d18a4d4fb1659808c2e1dc2719

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