Malicious PDF — malware analysis report

Static analysis result for SHA-256 f844426d2c58f847…

MALICIOUS

PDF

41.1 KB Created: 2020-08-12 10:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9299ea73f3e3fcd1447cbfd339bd8ca7 SHA-1: c8d69c6779000049951c346280be793f7774aa8c SHA-256: f844426d2c58f847fef817e8bba2853b1e03df32d12ecddfef24731dada6634f
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'music crossword puzzles pdf' and includes the primary malicious URL. This suggests a social engineering lure to drive traffic to a malicious site, likely for further exploitation or malware delivery.

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/wb?keyword=music%20crossword%20puzzles%20pdf In PDF document text
    • http://juviv.wppsfete.com.au/uploads/1/3/0/8/130814328/1a6f27d8f94.pdfIn PDF document text
    • http://files.mariaburtonart.com/uploads/1/3/0/7/130775156/c28011.pdfIn PDF document text
    • http://files.cheltenhamelim.org/uploads/1/3/0/7/130738805/vesabarogisega_fefezema.pdfIn PDF document text
    • http://files.vikingsoul.net/uploads/1/3/2/7/132740951/paremur.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/1/0431/0981/0343/files/65399374237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/sleeping_lotus_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/adosphere_1_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2511/9904/files/wananiwosemukoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/61847969145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/la_boite_a_merveille_analyse_complte.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/89126348563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/47082808670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7886/7351/files/78575570791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5185/9611/files/sewoso.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 6

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_off000062d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D2 5084 bytes
SHA-256: b90c22829fbc516444d56269a4f748fdba91ef97633d684376c224eb83b110c3
font_01_sfnt_off00007451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7451 10512 bytes
SHA-256: 23d7574c57c3df441b34d70b0409e76bd04b75bb3c6f3c89e8863a9365c47f67

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