Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8d54066e54c94c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-15 03:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 23c4dd398c715d97db598ee49464a4f0 SHA-1: f8c0680762deb6e2edc91f4ac802dcfe910eee62 SHA-256: 9f8d54066e54c94c2932880800c86b46bb14107a85db183d7f20c83e7f0b433b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes the text 'Complete calisthenics free pdf' and the malicious URL https://ttraff.cc/pify?keyword=complete+calisthenics+free+pdf, suggesting a lure to download potentially harmful content. 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.cc/pify?keyword=complete+calisthenics+free+pdf In PDF document text
    • http://files.tasmanunited.nz/uploads/1/3/0/8/130874328/4484027.pdfIn PDF document text
    • http://files.centralanimalhospital.org/uploads/1/3/1/3/131380623/xukufetakasadagin.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/1/0434/1438/8888/files/fokozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/lift_master_opener_model_1260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5652/8544/files/85037424614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0957/files/79148008694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/automatically_save_attachments_in_outlook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9964/3297/files/siwudasuragoxutakon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2416/7591/files/jzyk_angielski_dla_gimnazjalisty._gramatyka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/nfpa_30_2015_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/31813408717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/customary_law_noun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3530/3831/files/effortless_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4109/4817/files/dazemexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/571398575.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_off0000664a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664A 5300 bytes
SHA-256: dab524efff8959e27b399a46a5ad6fe318bacec3094d157b92294c24ccacbe40
font_01_sfnt_off0000781c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781C 10204 bytes
SHA-256: 56d8e79e5d5e1930b7cbf49e2731ccf77135a1907798f3226259210559d2f268

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