Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b4038200f18d02…

MALICIOUS

PDF

60.6 KB Created: 2020-08-13 14:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 68474a927559ccb8f6978c37e97d8e66 SHA-1: 0de6fa8fc3941a7d74893c12c5dae8af4bcab384 SHA-256: 71b4038200f18d02dd6c9e367bf697d868a1c5f9054066b35197e5cf529218fb
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector infrastructure (ttraff.cc). This redirector is used to obscure the final destination, which is likely a phishing page or malware download. The document body, though heavily obfuscated, contains references to a 'family and friends 5 workbook answer key pdf' and a URL that leads to a Shopify domain hosting a PDF, suggesting a lure for users seeking educational materials. The ML classifier strongly indicates 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=family+and+friends+5+workbook+answer+key+pdf In PDF document text
    • http://files.thefordhambleat.com/uploads/1/3/1/3/131380756/sujudiriz.pdfIn PDF document text
    • http://files.necfgsd.com/uploads/1/3/2/7/132710671/735fe631596792c.pdfIn PDF document text
    • http://pinav.graniteexpomn.com/uploads/1/3/1/4/131482975/kinidut.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/1/0432/6667/0745/files/27132963657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/beginners_python_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rojifibopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/87032034236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/18105564263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7332/2664/files/hyena_word_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/68929083624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2229/9815/files/bncc_ensino_fundamental_mec.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/pibokopevipeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7750/7999/files/que_es_isquemia_cerebral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/nelalexelugodozobimiwujin.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000adfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADFA 5664 bytes
SHA-256: 2e11064cb1a72d864847ec795c579b079bfa0883a242706b14c91d5cab1e1e0c
font_01_sfnt_off0000c142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC142 10520 bytes
SHA-256: 3851ccff21e910c1537362d6ba53e0bb5c0cf5663f602747f0c73509de1d8426

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