Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dac6d3831ff3771…

MALICIOUS

PDF

35.1 KB Created: 2020-08-23 18:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 166be59ba56e25bb6c8b994bfddb20c0 SHA-1: b07971580b395c432fa9fe81896e414a04e7d950 SHA-256: 2dac6d3831ff3771658b27f6d702276b938ba66aab39c6bcd1608c57009fefe5
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that appears to be a redirector, and numerous other embedded links were found, many pointing to external resources. The primary malicious activity appears to be the distribution of links to potentially harmful content.

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.ru/pify?keyword=can%2527+t+help+falling+in+love++haley In PDF document text
    • http://ravuv.richmondinsight.com/uploads/1/3/0/7/130776485/5338455.pdfIn PDF document text
    • http://gevufape.fleischerstudios.com/uploads/1/3/2/6/132680981/ruxomu.pdfIn PDF document text
    • http://rekadab.bravingmidlife.com/uploads/1/3/2/6/132681670/a03f8.pdfIn PDF document text
    • http://bakasinu.michaelhadjimichael.com/uploads/1/3/0/7/130738531/4692345.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/1/0437/0202/6393/files/fapajojuxixiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/24901197059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/9363/1652/files/funny_mind_blowing_riddles_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/21549034366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/fenukovukane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/lonega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/anthropometry_for_designers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/seditetulumikifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/badivedotezumedevurek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/wuwatufajegoweguninu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/pologuv.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_off00004d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D69 4992 bytes
SHA-256: 99c598bbda7bb1f9b207f7c640a48c03b696924d36247ae48ac62532f94c642d
font_01_sfnt_off00005e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E80 9600 bytes
SHA-256: 218ec53ae55696a4fa0fd4e62e3ba60392de16c0c05b61e1a76dabb9f8b9d5b2

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