Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68baeb530a15e90…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 21:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 130d16882428f3aa5d7e707e190354d6 SHA-1: fa5e0341429dd84881ab0815bd9b8120b0c026a4 SHA-256: a68baeb530a15e909bf35539bc77fff5a6264869c29e7b016c7542a7e87e8dad
194 Risk Score

Malware Insights

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

The PDF contains a deceptive document body and numerous embedded links. Critical heuristics indicate the presence of a malicious redirector link and a link farm, suggesting the primary goal is to direct users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, so the attack relies solely on social engineering via links.

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=ejemplo+de+calaveras+literarias+pdf In PDF document text
    • http://wuvoke.justgiver4pd.com/uploads/1/3/1/4/131408899/cb8981240aa933.pdfIn PDF document text
    • http://files.movingforwardglancingback.com/uploads/1/3/0/8/130814226/9019cf09.pdfIn PDF document text
    • http://files.lscrta.org/uploads/1/3/0/8/130874620/jemudiveretu.pdfIn PDF document text
    • http://files.sof-trainingfund.com/uploads/1/3/1/6/131606454/9131848.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/1/0432/2040/2336/files/nvs_catering_assistant_question_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/73889452803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7525/4937/files/asvab_arithmetic_reasoning_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1268/5977/files/fusogukemukirituwonuxudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/gym_candy_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/lonenomivogazuxifonuwor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8642/0893/files/solojak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/sedemad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/81643164912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/cambridge_esl_placement_test_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/6369708734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/83056591286.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_off00006ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF6 5392 bytes
SHA-256: 1ca330b5b93449ec1ab83b3d104a7c3768b767120ac38186ce898285ec898c1d
font_01_sfnt_off00008247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8247 11248 bytes
SHA-256: 204e4b7627cace3e78057946bd60e234c749d40eef35aeb0e90484d40eb0756d

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