Malicious PDF — malware analysis report

Static analysis result for SHA-256 8963e2ae863d5e3e…

MALICIOUS

PDF

44.1 KB Created: 2020-08-08 22:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 93ec46fbd2e3d1393bfe449492561534 SHA-1: c1ec2aad0bb9c3042b8f4caa6fae2402a694b8d2 SHA-256: 8963e2ae863d5e3e53988a4cf2f0bd4dd567e1087a279ca476bb28e36f9c42f9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector designed for SEO spam and phishing lures. The document body, though heavily obfuscated, contains text related to a textbook download, aligning with the observed redirector URL's keyword. The ML classifier also strongly indicated 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.ru/pify?keyword=grade+12+ncert+chemistry+textbook+pdf In PDF document text
    • http://files.carlylelabuschagne.com/uploads/1/3/1/6/131606789/rivebila.pdfIn PDF document text
    • http://files.kathrynthornton.com/uploads/1/3/0/9/130969800/nefisaxeda-fesizotivek-zirerejoda.pdfIn PDF document text
    • http://files.aroundandbackagain.com/uploads/1/3/1/4/131483955/tojusi_maforen.pdfIn PDF document text
    • http://rotiridij.ttsvoronos.com/uploads/1/3/0/8/130814229/fizovosadozen-durugepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/70165231966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/64909309386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/bijolagujewepajade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/bederuduko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/65703840491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2407/9254/files/weather_alexandria_va_hourly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8443/7922/files/abyss_miniquest_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/cognitive_affective_and_psychomotor_domains_of_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/top_100_songs_of_1977.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_off00006033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6033 5952 bytes
SHA-256: 285265094b7745c83db08d8df53e13427bc1c63a528bdfcce81d057805a48cbe
font_01_sfnt_off0000745d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x745D 9920 bytes
SHA-256: 1eef8968d5a56032fe43817c2bfada6960d684faa840d96132da067a37ae5742
font_02_sfnt_off000096a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A7 3260 bytes
SHA-256: aa0141ef1983ca6a1e75555c5f201f5e267198d67577c6d264f88900ae5ec0d3

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