Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace363f905affc9d…

MALICIOUS

PDF

38.4 KB Created: 2020-08-05 11:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7cc28782d8dc923ad3cdaa6b4e4ff759 SHA-1: 124991c76fa58c9638b25083ae34997a97b9d221 SHA-256: ace363f905affc9df2a67ade55e2c818fc83a510461722e1974602692664324d
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body text, though partially corrupted, mentions "Red cross bls handbook pdf" and includes the primary malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm further supports the malicious intent of driving traffic to potentially harmful content.

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=red+cross+bls+handbook+pdf In PDF document text
    • http://files.littleladyo.com/uploads/1/3/0/9/130969004/furopigolijur.pdfIn PDF document text
    • http://files.fhwellness-ca.com/uploads/1/3/2/3/132303083/kuvedubulowe_kojolagitikaf.pdfIn PDF document text
    • http://kitepuro.ourpeaherpod.com/uploads/1/3/1/4/131407469/sariruvusarib.pdfIn PDF document text
    • http://files.team2834.com/uploads/1/3/0/7/130776518/kudopomizofuxuxik.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/1/0433/1018/6654/files/nuvaguzajazipitulemulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/tumagedituvurudorukozege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/navy_seal_workout_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/51374790035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/40469404339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/21040383315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/gupivalowolafudepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/buvavaxaburiwurumowis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/lista_de_alimentos_ricos_em_proteinas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/sodud.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000585f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x585F 5452 bytes
SHA-256: cc4d0382781768c25a37ee25833f361d5034edde2b600ef0b3b0f5ec980afe64
font_01_sfnt_off00006ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADE 9896 bytes
SHA-256: 9196dff954e8490c4be6606eee9fd6a7c5b7c5ec40436f1c28dad6ebb2fb1df9

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