Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e36b7e14a46704…

MALICIOUS

PDF

51.3 KB Created: 2020-08-25 20:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: adb342b4767067ec0bc524b5bf83cf9e SHA-1: fe1240af94130965470adc1a69381b97b1e8ef8c SHA-256: 65e36b7e14a46704b8f29d5143ec94998fe1fe7b53b1320ad952b51788e604da
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it's a redirector to known malicious infrastructure. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=columbia+college+contemporary+civili'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to this malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=columbia+college+contemporary+civili In PDF document text
    • http://files.socohomephotography.net/uploads/1/3/1/4/131482881/6770564.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/1/0433/0687/7080/files/58580374151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9825/8073/files/exploring_creation_with_general_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/39157747327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/gre_vocabulary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6076/0471/files/20721786613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/hunger_games_free_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/cerwin_vega_vpas10_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/refajavalezepovubufuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/american_heart_association_guidelines_blood_pressure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/kegikunusexetinulenufukis.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

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_off00006dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 5280 bytes
SHA-256: 27555089faba1bdb47d16203f551f5a2567fa67b5be93114c218277941f8eb39
font_01_sfnt_off00007fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB4 13908 bytes
SHA-256: b1f457d4b7a83f9418cb00179668b7663127632dad015bcecd98382c929aac87
font_02_sfnt_off0000ab0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0F 16132 bytes
SHA-256: ccf879661c26e8d85a43d4fcfbba60320246430dcbf46b047d24072eb45b37a5

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