Malicious PDF — malware analysis report

Static analysis result for SHA-256 0245af12c10f2c26…

MALICIOUS

PDF

42.7 KB Created: 2020-08-17 18:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f3f8a3cef7fe99f4ed7a898ffcb1a222 SHA-1: fa171aa3d51a6ad0a0cec31544bda2f92c641c69 SHA-256: 0245af12c10f2c26baecd624af573105ee45976ef76a6e158845b649cd85345e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, disguised as a guide for formatting an SD card. The heuristic firings indicate the PDF is a malicious redirector and part of an SEO link farm, designed to phish users. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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=format+sd+card+ubuntu+ext4 In PDF document text
    • http://files.shanepsingh.com/uploads/1/3/1/4/131406855/6268538.pdfIn PDF document text
    • http://files.hayleyhudson.com/uploads/1/3/0/7/130739789/cd859.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/1/0438/5816/5925/files/936_483_2979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/curriculum_vitae_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73881495537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/kigurag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarozasupevukofapunaxovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2953/6668/files/kerafepedab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/87466449797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/adversus_jovinianum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6411/9716/files/cypress_export_test_report.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2E 5304 bytes
SHA-256: d7d3af263ba55dc0a9c0b99817fc6003871bac2400fb848b7c067defce2e3b21
font_01_sfnt_off00006e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E18 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000076a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A5 12156 bytes
SHA-256: 93da4c1f0fa8eef1f775890140608d9220f9b499de6da7237af4d552f3e4f469

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