Malicious PDF — malware analysis report

Static analysis result for SHA-256 88fbdfbabad37928…

MALICIOUS

PDF

44.6 KB Created: 2020-08-14 05:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fad644b6d151f6236e884bbd4f5a423b SHA-1: b6f4e06357214feda09248c1cb1b5cdbaaf7f2a9 SHA-256: 88fbdfbabad3792822822e6a8870618ce52f4c9e5c1089a7dc236889f1ca9bd8
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, masquerading as educational content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to funnel users to potentially harmful sites. 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.com/pify?keyword=conversion+practice+worksheet+5th+grade In PDF document text
    • http://files.smeccinc.org/uploads/1/3/0/7/130775515/xipemonunevuvoniwolu.pdfIn PDF document text
    • http://fonapid.texgermanshepherd.com/uploads/1/3/1/3/131383407/f866c96b1ddb11f.pdfIn PDF document text
    • http://bemoxipob.deniseturu.com/uploads/1/3/1/4/131408100/1930318.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/1/0434/7982/6582/files/unicellular_and_multicellular_organisms_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3457/0915/files/openstreetmap_baden-_wrttemberg_garmin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/bezuxutejatenuwejukire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/18838741941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1451/1001/files/star_wars_the_roleplaying_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/porsche_cdr_30_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/2079/8363/files/tisase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9232/3995/files/quantitative_aptitude_topics_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/bangalore_map_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/10583051081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/bujadugetugema.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_off00006ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF9 5548 bytes
SHA-256: 20db697e5a58228b2a9c2493941ac5c50e0fdf1c993d545a27237155c5788842
font_01_sfnt_off000081dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DC 10352 bytes
SHA-256: d0cc5461f8d1c76b9e776c482de378fea2907143bb8e4cbbb183734c449af854

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