Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f963681f1642706…

MALICIOUS

PDF

35.9 KB Created: 2020-08-09 05:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1098fc4718c68ddff59b4fefc7bc05e SHA-1: dc74bfa4511a7152e03150165e158632dc2277a7 SHA-256: 9f963681f164270681214b5d577b619a757ad244cabb0193a3614e1e6448737e
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm suggests an attempt to manipulate search results or distribute malicious content through a large number of seemingly innocuous PDF files.

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=calendario+abril+2020+chile+pdf In PDF document text
    • http://files.ashevillewritersintheschools.org/uploads/1/3/2/7/132740552/3094792.pdfIn PDF document text
    • http://gixofu.savingthosewhosaveus.com/uploads/1/3/1/6/131606490/bitopalexora-pusefexaxili.pdfIn PDF document text
    • http://files.openmindfitness.com/uploads/1/3/1/8/131856277/1050728.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/1/0429/6992/3743/files/kinokixinojivuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5019/5354/files/consumer_awareness_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/pajedimiparojupisozutupir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/edexcel_ial_a2_chemistry_data_booklet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8746/9471/files/28637601038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7895/8758/files/gabasuxarupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/statistical_quality_control_montgomery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/96974392377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/line_and_angle_relationships.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7689/3334/files/bukaxuguwerexelikax.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 4

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_off00004c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3E 5384 bytes
SHA-256: bd444a7bb621b60ed9e78c7e23f611e012208473e1a93a6f9add125e7e0994ad
font_01_sfnt_off00005e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E80 10496 bytes
SHA-256: e9d99cab8180298c35958ad2028fe6e601ea7c2ea5d204541c157be9c59c4a30

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