Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d991782dc314ea…

MALICIOUS

PDF

47.1 KB Created: 2020-07-28 18:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6c2b50949ee57e401a1379068aef728c SHA-1: 2a3a55ecc82b84b601b81a0ca246acdc80f1015a SHA-256: d4d991782dc314eab695f1f1eb83c52ba208008bdad29a82d556d10996a12765
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, suggests a lure related to 'alternating current generator pdf'. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure, and another heuristic flags it as a link farm. These factors suggest the document is designed to redirect users to malicious sites.

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.cc/pify?keyword=alternating+current+generator+pdf In PDF document text
    • http://files.romerolab.com/uploads/1/3/2/3/132303134/vopovakak_bisefarebobulub.pdfIn PDF document text
    • http://files.pcpachicago.com/uploads/1/3/1/3/131384718/veforopuxefu_wodupogul_xitokowipel_wurezorufob.pdfIn PDF document text
    • http://files.joanneschwehmbooks.com/uploads/1/3/1/6/131606490/ganobekaxafatar.pdfIn PDF document text
    • http://files.farmingninja.com/uploads/1/3/1/4/131453268/pumet.pdfIn PDF document text
    • http://files.newyorkhomescholars.com/uploads/1/3/1/1/131164557/makik.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/1/0438/1153/7053/files/85271699890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/vuses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/ribozudakoniliwag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ranugebiwuzejivuzuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/bodad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/23431223125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/54237695197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/83025773448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/legimunasomonaxexido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52945462890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0391/2098/files/lemekirudok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0303/4276/files/56268851276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/60107990869.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 8

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_off00007b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 5016 bytes
SHA-256: fcf50e14d5b80c9bddeb85a25f96afe2e82e36222f63ddf137445bd20b6522a5
font_01_sfnt_off00008c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C74 10128 bytes
SHA-256: 7824d9096f4dd8681ff10cda09743b94180d9eae764e7d6e74c1b109289d4bf1

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