Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e7ffaf29f7a485…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 18:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e285363c7cc71b508fbe2ae27c056804 SHA-1: 45bd1ae9c39732802e36b4f477dbbcb4724581c8 SHA-256: 81e7ffaf29f7a485215e41882cbf55277a7c2eb6425c74f9aeb107c5db134d9c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body and heuristics indicate a lure for free downloads, likely to distribute malware. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=basic+accounting+interview+questions+and+answers+pdf+download In PDF document text
    • http://files.azwatersolutions.com/uploads/1/3/2/6/132681352/5e3982aa0d4.pdfIn PDF document text
    • http://files.techconnectwest.net/uploads/1/3/1/6/131606876/kiwoxubataz-zuxuli.pdfIn PDF document text
    • http://files.nickbridwellwriter.com/uploads/1/3/1/8/131856234/buxojapimo.pdfIn PDF document text
    • http://files.clarelouiseroberts.com/uploads/1/3/0/7/130740624/pujawaputi_wutam_tuvazan_jamatokegodura.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/1/0428/6365/7119/files/all_nighter_wood_stove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/edward_snowden_book_permanent_record.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/vepuzokimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5172/7513/files/xejasurer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/jemuduru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/lavumulokozoxazuwekefiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/tigufezep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0624/5534/files/54154928565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/witikidorubopexozuwuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/84472958311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/lolatijuzikifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9347/8814/files/spatial_reasoning_test_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/picsart_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/nobuvufisazibasutajalibub.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_off00006b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B72 5652 bytes
SHA-256: 02c52b0496151689e7b9f7da83783256492e629cfc7bc4fbd984c26831ff6c00
font_01_sfnt_off00007ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC6 9504 bytes
SHA-256: 6ea76186b534e7d71d3c592cbbe5333ba8d549ae07b7b447a0430682d44ed7f5

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