Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a6f634e9afebd5…

MALICIOUS

PDF

42.3 KB Created: 2020-08-12 06:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec9004ceaf4a309ab63d56b855d1a00e SHA-1: aab1cd374c084bc68b33a2ded05cb8e6d389fc35 SHA-256: 45a6f634e9afebd544e4bf8964145aa0941d2047d24ac9c95a22f9aeeb9b26c3
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious URL identified is https://ttraff.com/pify?keyword=sample+annotated+bibliography+apa+pdf, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious redirector attack.

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=sample+annotated+bibliography+apa+pdf In PDF document text
    • http://files.ramblinadventureclub.com/uploads/1/3/0/8/130813781/495262adcd3a5.pdfIn PDF document text
    • http://files.briarclifftrails.com/uploads/1/3/1/1/131164176/rumiko.pdfIn PDF document text
    • http://files.stinesfitness.com/uploads/1/3/1/6/131637306/8472244.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/1/0434/4456/8216/files/th6110d1021_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/50254234310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/83055083324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/sentence_word_order_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/vijojulategikunod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8314/4093/files/22028765155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/88100501660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/mudutimuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5842/1142/files/cadastral_surveying_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3366/files/futonugere.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BF 5620 bytes
SHA-256: 8ca9d4c0b8c549efd2f7ea15f3f55575eee2783aa02cf65ff96b033cd69b6506
font_01_sfnt_off00007aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAB 9996 bytes
SHA-256: 131c4773e77e3cf690761f919588fbc5e93c4cf857f98252d5dedf54538b0d0a

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