Malicious PDF — malware analysis report

Static analysis result for SHA-256 8330e751d6fb5992…

MALICIOUS

PDF

36.8 KB Created: 2020-08-11 17:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0086f21fad0634439858c8c1bce4c87 SHA-1: bce2807a5d4190e4b33efcc118e027b9ce3f0226 SHA-256: 8330e751d6fb59925a2c766e7ee538c691b2d170f8f5c18b317c0da624fede53
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that appears to be part of an SEO link farm for phishing. The document body, though obfuscated, contains the same lure text as the redirector URL, suggesting a phishing attempt disguised as a free book download. 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.com/wb?keyword=pharmaceutical%20emulsions%20and%20suspensions%20second%20edition%20revised%20and%20expanded%20pdf In PDF document text
    • http://files.brookesstreetkindynambour.com/uploads/1/3/1/4/131453284/buvaradepew.pdfIn PDF document text
    • http://jokasopo.robinrfischer.com/uploads/1/3/0/7/130738615/f4fa0cd73a266.pdfIn PDF document text
    • http://files.peacefulexperience.com/uploads/1/3/0/8/130815115/acbaf1510415f.pdfIn PDF document text
    • http://files.maplepta.com/uploads/1/3/1/0/131070846/2867490.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/1/0428/6778/5884/files/panerofuxelar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0591/0935/files/91140702490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/wexelavivibititogujetebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4781/2248/files/fogaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/gasiratuxupadadogem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/34937632381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/aadhaar_form_download_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1472/2460/files/script_writing_format_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/10934297125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/97319456365.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 3

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_off0000501f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x501F 5524 bytes
SHA-256: b79a16e7ae4f1ccbb50819f3a0fda8d0d90bd3a7ac15f331d7cd8193fa3a1463
font_01_sfnt_off000062cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CC 10220 bytes
SHA-256: 35f8aaccbaaf4c9c8eae61d6116c1d4e3c90b46b3bae51343df0e99584a32507

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