Malicious PDF — malware analysis report

Static analysis result for SHA-256 f963fec4183dde0c…

MALICIOUS

PDF

43.9 KB Created: 2020-08-07 13:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 71a57ff7a1ab77e49b36383bbf1aafa5 SHA-1: 3bbda62c05984db57ce9619e1d5ed21053f54f37 SHA-256: f963fec4183dde0c7dab6af818070b6eff9748e2f15a371a40de468192c0a075
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body and embedded URLs suggest a lure to download 'Adobe PDF reader', which is likely a pretext for delivering malware. The presence of a mass external PDF link farm further supports the malicious intent of redirecting users to potentially harmful sites.

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=adobe+pdf+reader+for+windows+7+32+bit+filehippo In PDF document text
    • http://files.calvarychapelsaintcloud.org/uploads/1/3/1/1/131164456/72bac0c423d10.pdfIn PDF document text
    • http://files.tasteingainesville.com/uploads/1/3/1/4/131437308/kuleruwageja.pdfIn PDF document text
    • http://timuvo.rooznote.com/uploads/1/3/1/1/131163667/7139601.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/1/0432/5556/2398/files/xevurerajivokilirited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8239/0440/files/37348934390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9944/2590/files/media_moda_e_mediana_exercicios_resolvidos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/tipedubamafudolerilewisiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/23324288144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7478/9281/files/ataraxia_filosofia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/51380858985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/12396119716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/kezibitudowesexibodozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/14093065062.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_off00006241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6241 5724 bytes
SHA-256: 3b257f15dd33263b0c069b1cd8fea15b54188b2240a3dabe0aa3ce1f428088d3
font_01_sfnt_off000075cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 14332 bytes
SHA-256: 4e0b5aa5a8252f25624eda97d4fbeaec2846bbe68bfc2610fabfb4aff7776c78

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