Malicious PDF — malware analysis report

Static analysis result for SHA-256 82499bb168dad18a…

MALICIOUS

PDF

45.5 KB Created: 2020-08-18 14:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 086e8bcdf95150954fb07fdf8a48f3f1 SHA-1: 3d832e672711bb2d997a28db65d346842cdbe010 SHA-256: 82499bb168dad18af65942a3cbbfd9990a7111790d1e4e4281e95110fc2a4a01
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded 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 link farm, suggesting a coordinated effort to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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=integers+worksheet+class+6+pdf In PDF document text
    • http://files.katrinamitten.com/uploads/1/3/1/4/131406780/b63c75ee288f817.pdfIn PDF document text
    • http://files.livingsilverspring.com/uploads/1/3/1/3/131398145/kikezosizofav.pdfIn PDF document text
    • http://jiradato.jcsualumnidc.org/uploads/1/3/1/0/131070374/fe31826c7.pdfIn PDF document text
    • http://files.carockart.org/uploads/1/3/0/8/130813979/32d65a0872d9814.pdfIn PDF document text
    • http://totase.libertyhighschoolorchestra.com/uploads/1/3/2/6/132680813/ddd8973b6f8e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/fanupububomixiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/doxerofebidopap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/36691103155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/pujokepagixepudusemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/62544684337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3466/4347/files/57224546074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1510/9797/files/discord_text_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/the_routledge_handbook_of_audiovisual_translation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/interventional_cardiology_procedures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/jurnal_cacing_pita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3266/6524/files/club_penguin_member_code.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 5404 bytes
SHA-256: 81e400d5e86d3d41c7c3c423a52dfab270d94f3b56ae2ace088848e9ae1931dc
font_01_sfnt_off00007765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7765 10380 bytes
SHA-256: 8ca841167459293232d1c88e0009358a701e9f09cb79c8a5c7a7e26043ee7e7b
font_02_sfnt_off00009ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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