Malicious PDF — malware analysis report

Static analysis result for SHA-256 df22f7bbe5254103…

MALICIOUS

PDF

43.1 KB Created: 2020-08-06 23:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a85f277976c1dae76128cb18cfb954ae SHA-1: d029f325a4c4661bd8746cd1daddcb09320dbfb4 SHA-256: df22f7bbe5254103e5e74c4bd771f7743734ecc9a8f919bfe503a525303817c0
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.com/pify?keyword=math+puzzles+brain+teasers+with+answers+pdf. The document body, though heavily obfuscated, contains references to the same lure and URLs. 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.com/pify?keyword=math+puzzles+brain+teasers+with+answers+pdf In PDF document text
    • http://rivinul.grassyforkelementary.com/uploads/1/3/0/7/130739430/mukukugokozudufupal.pdfIn PDF document text
    • http://files.jimmyzhan.ca/uploads/1/3/2/6/132682124/5764269.pdfIn PDF document text
    • http://files.spunglasstheatre.com/uploads/1/3/2/6/132680962/nuwej.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/1/0437/1880/3607/files/41585837321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/who_is_chris_pine_s_grandmother.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/lipid_classification_structure_and_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/43671074769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8332/3806/files/teoria_causalista_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6901/4177/files/fajixumuravik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9062/5191/files/lepemeforakibabugitatof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/anglo_saksonlarn_stnlnn_sebepleri_nelerdir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/dametuxuvobexuwejewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/probability_concepts_in_engineering_solution_manual.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 6

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_off0000695e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695E 5416 bytes
SHA-256: 728446dd80ce3f45e0e5c00829569b101e8dbb4c8014f116e0578b539d0699c0
font_01_sfnt_off00007bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDF 10500 bytes
SHA-256: 31a0124cda89ec5093ac0cf49924ba712778502eba75d6788ddd3c249cdba598

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