Malicious PDF — malware analysis report

Static analysis result for SHA-256 419b5b0769f5a1a7…

MALICIOUS

PDF

44.7 KB Created: 2020-07-29 21:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e44438ddbe1b8fd28e54719dfc876322 SHA-1: 9de87caddfb5de4726f4785e736f9954efc478d0 SHA-256: 419b5b0769f5a1a7fc35fda508eb121e5f8a3e13996538ba370c4d46ad3ef4a6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, a significant portion of which point to a link farm hosted on Shopify. One critical heuristic indicates a malicious redirector link to 'ttraff.cc', suggesting a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a book title lure.

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=aghora+2+book+pdf In PDF document text
    • http://files.yukonriverdesigns.com/uploads/1/3/1/1/131163705/e9535.pdfIn PDF document text
    • http://files.readymum.com/uploads/1/3/2/3/132302999/vikemejutiworuse.pdfIn PDF document text
    • http://files.bitcoinfuturesguide.com/uploads/1/3/1/3/131397987/bavobezurevojo.pdfIn PDF document text
    • http://files.kasakesari.com/uploads/1/3/0/7/130739143/8366599.pdfIn PDF document text
    • http://files.achinabuffet.com/uploads/1/3/2/3/132303009/4667293.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/kawovuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9072/9377/files/kebalufitanikezasumun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/budexojimomamuzarumedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4053/8773/files/31505722563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/37251457660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/22433854580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/bipuxisalogisarafid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23582012054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/19952333266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/13640449104.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_off00007298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 4856 bytes
SHA-256: b534ad6fffe3f55fc8b228edf827b256fc99fb50a4b15fc31fe216957ce1203d
font_01_sfnt_off0000831e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831E 10196 bytes
SHA-256: 9103df4a19dc576a844ae5f4a83532a8147561511863ec6250a8ce42b923d4f0

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