Malicious PDF — malware analysis report

Static analysis result for SHA-256 71fb1281e3af812e…

MALICIOUS

PDF

57.4 KB Created: 2020-08-08 07:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fba4d9b477c7c41ebdb8ec56dd8c4224 SHA-1: 66ad290b1a63f730fb02da6ba906a47563a24900 SHA-256: 71fb1281e3af812e06bcc892227fa594ecd681c380351a27806adc603ed0052c
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate downloads, but they redirect to a known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same redirector URL. This suggests a phishing or malware distribution attempt disguised as a software manual.

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=autodesk+cfd+2020+black+book+pdf In PDF document text
    • http://files.eq3caribbean.com/uploads/1/3/0/8/130814466/dipos.pdfIn PDF document text
    • http://files.happytimes-cdc.com/uploads/1/3/0/9/130969772/kodugojotalabukuxida.pdfIn PDF document text
    • http://wexuwora.besttinyhouses.com/uploads/1/3/0/8/130874197/4156777.pdfIn PDF document text
    • http://files.strictlyskillsbasketball.com/uploads/1/3/1/4/131411596/fixutul.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/1/0432/7319/1588/files/litobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/21665059991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/sadixufefuzadomiporena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/33469516364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6902/files/russianhits_64_radio_logo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8714/9733/files/xisovilaxutarob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/noviximajasedoripo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/40309961819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/97246925398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/43053608964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/14746301588.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
🗂 Part of campaign: strictlyskillsbasketball.com 3 samples

Related samples 7

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_off0000957c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x957C 5520 bytes
SHA-256: 723ff6d86574b052ff5a54750f2de08a5bf009fd3f9b3b1d28be1056fc6e8e33
font_01_sfnt_off0000a855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA855 15724 bytes
SHA-256: 83f209d91a27ad391ea572ce230e11211142848b731173b387fad4148c4dfe94

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