Malicious PDF — malware analysis report

Static analysis result for SHA-256 119909398aa48750…

MALICIOUS

PDF

55.1 KB Created: 2020-08-14 04:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 908e0bab545c4685e017f2541f9b0969 SHA-1: f5473dd356ad633d44def4de0fe0ca1043aa91b5 SHA-256: 119909398aa487506a842b0b24d02bd358d5226ad9b99b14bf0758506757d38e
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirect to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the lure for a phishing attempt. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm designed to obscure the ultimate malicious destination.

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.ru/pify?keyword=machine+learning+pdf+by+andrew+ng In PDF document text
    • http://files.summerfry.com/uploads/1/3/0/7/130738836/lumaluxuninu_zuten_kuvipinukakef_rosobi.pdfIn PDF document text
    • http://files.tasc-group.com/uploads/1/3/0/9/130969418/1500612.pdfIn PDF document text
    • http://files.pennjournalconlaw.com/uploads/1/3/1/8/131871424/xizotubulaxumub.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/1/0438/4315/8166/files/xuzerevatinilezoweja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/javascript_reload_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4561/2694/files/90603156608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1355/2802/files/watibotuwamilofep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/dawuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/19487504779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/99018954891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/markup_ipad_apple_pencil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/wenofovasezanesokogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/bhu_bsc_nursing_entrance_exam_syllabus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8920 3728 bytes
SHA-256: a385329756354b6d87e0d034aafa60e3018804f8844c06108e9285a62e586fd1
font_01_sfnt_off00009651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9651 5580 bytes
SHA-256: 1303771a4108c69f866cc7407ee4fd6d0e93796452a0cbf49185edfefb0bd7ce
font_02_sfnt_off0000a955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA955 11000 bytes
SHA-256: 90a80006472d202cd27d865dc0491cf17ab0d0087ada0d1c47d5853f9227ee8e

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