Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96250bb855b9491…

MALICIOUS

PDF

37.2 KB Created: 2020-08-04 06:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b2ba974cc245ed4d09594af50a47e76 SHA-1: 042ec667c9b79b2d6dba50e21ec30a29ee3c9148 SHA-256: a96250bb855b9491c5e5755b5fda4e6a0c7e1b104a5fd28b768fbb54fec9baf6
202 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm hosted on Shopify. One critical heuristic indicates that a link within the PDF redirects to known malicious infrastructure via 'ttraff.cc'. The document body, though heavily obfuscated, contains text that appears to be a lure for free books, combined with the malicious redirector URL. This suggests a phishing or redirection attack aimed at delivering further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+medical+biochemistry+books+pdf In PDF document text
    • http://files.sdadata.org/uploads/1/3/1/4/131406849/domiwatu.pdfIn PDF document text
    • http://files.agathahomehealth.com/uploads/1/3/1/3/131379792/potav-mudikojoki-siwajozurijulem-vegiwajeve.pdfIn PDF document text
    • http://files.alexasnyderstudio.com/uploads/1/3/0/9/130969356/9843479.pdfIn PDF document text
    • http://files.lavahistory.com/uploads/1/3/1/4/131406520/572069.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/1/0430/8611/9079/files/goxuzitifomulep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/cateterismo_cardiaco_en_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2824/9767/files/ancova_test_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1299/files/62746323873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/5680936048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/fagoketila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/40776526816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/witcher_3_guide_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/11202704005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/53617968681.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 6

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_off000053d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D4 5656 bytes
SHA-256: 023e2bbac4a76d68bf2548d8798ac599d6811aa1dea5bd6e0d04c336c3899b82
font_01_sfnt_off000066e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E5 9756 bytes
SHA-256: d9ecd3a8fc70234735f19f88118e16372cbe28474606d10007e3acd504c94565

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