Malicious PDF — malware analysis report

Static analysis result for SHA-256 721f47169e2a4230…

MALICIOUS

PDF

51.0 KB Created: 2020-08-19 20:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2910edc2d393a2dbcfea8d9ee69ee90b SHA-1: f71807e5e1b59c96e98a2b79f8733222fa578097 SHA-256: 721f47169e2a4230aaeec431384ce9f148f4fd6adf3620e933882f8a4d369d94
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating an attempt to lead users to malicious content under the guise of free downloads. The embedded content, while obfuscated, contains URLs that are part of this redirection scheme. The ML classifier strongly supports the malicious nature of this PDF.

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=bhaubeej+marathi+movie+songs+free In PDF document text
    • http://files.labyrinthcreations.com/uploads/1/3/0/9/130969543/7674498.pdfIn PDF document text
    • http://veliwal.whitbybrooklinprobus.com/uploads/1/3/2/8/132814930/d5ba6a4ee9.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/1/0440/8547/7541/files/libasazufokadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/gibukegapomokosex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/rijuxonisarujowasive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/87135316304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/56794052004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudivilijekeroleve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/kileluvenatogonojima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0485/4435/files/fapikotevelulamurasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8125/0469/files/android_stored_wifi_password.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/xagirovowumorip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/adobe_acrobat_reader_pro_trial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9502/9915/files/benafapimegosex.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_off00007f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F83 5476 bytes
SHA-256: ead69c27e33701ba638807e053fa4d7e2cc09bd2044e3acca4e8e8d8c66b8cf2
font_01_sfnt_off00009214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9214 14592 bytes
SHA-256: 7b10d6e14e67a986d4464083e5a180c4037c93c4cd7e878378fe5c96f5d39b73

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