Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b913ae5fae5cfe8…

MALICIOUS

PDF

37.1 KB Created: 2020-08-23 16:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 529b4280ef256b0f3f48c7d305b87b3d SHA-1: 4ded301bc65690dab75cfba0c1ae1b24c0fc22dc SHA-256: 5b913ae5fae5cfe8f2f64c8659885d9093067dd7e9c3fbe2cc2c76ef93e10e51
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, with one specifically identified as a malicious redirector. The presence of a 'download button' heuristic further suggests a lure to download potentially malicious files. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.com/pify?keyword=vaastav+movie++pagalworld In PDF document text
    • http://files.thaddeusart.com/uploads/1/3/2/6/132681992/novama_kijawuwur.pdfIn PDF document text
    • http://files.northcoastoutfitters.com/uploads/1/3/0/8/130874058/8006452.pdfIn PDF document text
    • http://rivix.rpskillsunlimited.com/uploads/1/3/1/8/131857334/730c6293a25800.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/1/0430/8143/3242/files/jenibuxowowivoxaxoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/fovurajixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7024/9374/files/91720156723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/zukeditowubixozutumab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/tilitidavuzekoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/22644962412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4323/8567/files/green_bay_schedule_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/guxudozenugileguxikavamik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/research_assistant_job_description.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/mabidakek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/nijobupufixewigim.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_off000052eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52EB 5396 bytes
SHA-256: 3932ae9afd6fa1cba225fe100c76e7c16609efa0bbad23da98d40c21af014438
font_01_sfnt_off00006545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6545 10096 bytes
SHA-256: 65160659a792d143fd62f74a59644a7c9f8c468175b7219b6014c57b90cc4fe2

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