Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a5568d305e469f…

MALICIOUS

PDF

49.8 KB Created: 2020-08-05 14:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4acf76b4e210eff77b556543eabe853a SHA-1: c1dca9d644af8a69f4d831b70d5f685f34f2d18d SHA-256: b7a5568d305e469fed0c1ddeab3f045b11f31a49606e48c565e105f4d8e65d6e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'Brihaspati dev ki aarti pdf' and the malicious URL is present. The primary attack vector appears to be a link farm designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=brihaspati+dev+ki+aarti+pdf In PDF document text
    • http://files.dynamichealinghomeopathy.com/uploads/1/3/1/3/131380600/dejoponidometo.pdfIn PDF document text
    • http://files.marilynandco.com.au/uploads/1/3/0/9/130969297/pulovevejepubujor.pdfIn PDF document text
    • http://files.pvcseagles.com/uploads/1/3/1/3/131381658/wuzedurojejerawuso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7772/9442/files/35711090724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/17243176154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5924/7264/files/80362190399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/43387009719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/ssh_secure_shell_downloads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/60686907197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/47698857111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/vuguvogivaxoneduwowabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/35727344129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/88890662392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/53852474008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1092/2392/files/74521364459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/24221737786.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5347 2880 bytes
SHA-256: 80960c5ef920dc812f40421d0c41ad5272b60f71c1256c1bdf7a11afd8d5b2df
font_01_sfnt_off00005d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 4840 bytes
SHA-256: 751eda3adeec6bfc35942796a18b4afdcbbb309064e445e677d6c64d41339bdd
font_02_sfnt_off00006e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0E 12756 bytes
SHA-256: 75aa7e4402a49e2717fc31be2b36f51f6205766e9e12fbf59b5dc163ec4a4599
font_03_sfnt_off00009628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9628 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
font_04_sfnt_off0000ab40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB40 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3