Malicious PDF — malware analysis report

Static analysis result for SHA-256 53471302dd95fa76…

MALICIOUS

PDF

43.2 KB Created: 2020-08-06 19:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d27a349feb2b655859372bd3fc99f449 SHA-1: 7cb519bb893abd18cf7e9e8dd23885ee1dec52c5 SHA-256: 53471302dd95fa7646df5cde86647604498856f475142b1ac2ea80fcba40a0dc
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified as a redirector for potentially malicious content. The document body, though heavily obfuscated, contains text suggesting a lure related to genetics, and the presence of numerous external PDF links further indicates a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious.

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=anemia+falciforme+genetica+pdf In PDF document text
    • http://files.kapanshipman.com/uploads/1/3/0/7/130740258/ee7f97.pdfIn PDF document text
    • http://files.northbranchwoodworking.com/uploads/1/3/2/6/132682607/8700529.pdfIn PDF document text
    • http://files.selffound.net/uploads/1/3/0/7/130775490/xokavimodob.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/1/0428/7257/0012/files/5596300657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4868/0089/files/benefits_of_exception_handling_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/debodenawiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/harmonized_tariff_schedule_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/42182521804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/xirifitawuganudododa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6207/4261/files/94752506670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/9037741123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5023/8101/files/14122042502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/jetiremasikijexefirome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8449/7575/files/54608079625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5126/0823/files/wakumesibodenekapafuxomun.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
🗂 Part of campaign: annalisavivona.com 3 samples

Related samples 7

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_off00006af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF3 5284 bytes
SHA-256: b18ec1f4ed6974b9a110aeef40334d91bc7debf1b3ce06822dc31b4e1f3581c7
font_01_sfnt_off00007cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 10664 bytes
SHA-256: eed602a7325e843232a6a54ec5a183cb59fa01776e4b789709dbf4ad49c71102

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