Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfdcc62cfafb9c80…

MALICIOUS

PDF

33.7 KB Created: 2020-08-11 16:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1133575eb9673f087fc738ab58944af2 SHA-1: 7224127364d8b14254abca87bf361ef5917e15c5 SHA-256: bfdcc62cfafb9c8044e3c03735937da493914ff73edb204accf3ff75bf675caf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings. The primary attack pattern involves redirecting users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of specific execution behaviors.

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/wb?keyword=comparative%20and%20superlative%20exercises%20pdf%20language%20worksheets In PDF document text
    • http://baxet.chardontomorrow.org/uploads/1/3/0/9/130969723/5608592.pdfIn PDF document text
    • http://files.blossomparkaz.org/uploads/1/3/1/3/131384432/5195493.pdfIn PDF document text
    • http://files.davidjohnlang.com/uploads/1/3/0/7/130775431/2465256.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/1/0432/5461/2123/files/groover_robotics_industrial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/fupegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/25703457557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/dnd_5e_warlock_spells.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/42797844004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6811/3574/files/shadow_fight_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/gufaperi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4798/4027/files/korean_beginner_vocabulary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/academy_stars_teacher_s_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3789/1482/files/kambikuttan_cartoon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1984/6311/files/xudajazodez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/the_road_not_taken_explanation_line_by_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/losafa.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 1

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_off000045fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45FB 5760 bytes
SHA-256: 90f911733526b932799200f1900c71dc17c4bd7dfc8b4bf0bec821ab2a5e0d65
font_01_sfnt_off0000597f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x597F 9392 bytes
SHA-256: e1ef44c3e2e287c41a4276836511163fa92d58043be62c8aa9e47ba225d2fb6c

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