Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c04143b62792f4…

MALICIOUS

PDF

52.8 KB Created: 2020-08-09 16:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d3f61aa7cd81357a0af81f6c051aedd SHA-1: a649cbfcde82ab5701cdd606b5af174316ecd641 SHA-256: 20c04143b62792f468e6ec7611c48735cdaf0a916e6ea14d9eb1e991767a2f85
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking title, suggesting a lure to disguise the malicious intent. No scripts were extracted, but the primary attack vector appears to be the embedded malicious link.

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=behaviorist+theory+of+second+language+acquisition+pdf In PDF document text
    • http://files.eastbayesl.com/uploads/1/3/1/6/131636808/binutusizepupomog.pdfIn PDF document text
    • http://files.chemtutorsg.com/uploads/1/3/0/7/130739495/taxemalubopefo_sedatoviv.pdfIn PDF document text
    • http://files.junipertreeboutique.com/uploads/1/3/1/4/131408170/4740651.pdfIn PDF document text
    • http://files.paxchristisa.org/uploads/1/3/0/7/130739265/44c1c8.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/1/0433/7372/3800/files/critical_thinking_test_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/ronevuxiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/kadozojabasumakepebuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/puneberun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7086/4025/files/49501647904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/uu_sebelum_amandemen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/zojiwifafew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/16344608518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/gakazuwumik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/89426598603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/75405729257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1310/4035/files/73330647229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/nedugoduzugokik.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_off00008f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F16 5752 bytes
SHA-256: d4a794adc6c12846f6dc5a9e1e3d6b830a7fb34dcfb40fa40ff0613b4e788bc1
font_01_sfnt_off0000a2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B7 10204 bytes
SHA-256: 2c9f06ba08448c469c61b8dd398fb4edb2c772663ca20e988f16bec54bebb992

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