Malicious PDF — malware analysis report

Static analysis result for SHA-256 58144af962cce535…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 14:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6179142fcca2b8c2acf557d8cde85248 SHA-1: 850fe9bb20202ee100b3ff2aea85a8efbe9cf987 SHA-256: 58144af962cce5354cbf9198d6a19120b91816ad57108ce81e3e4a67de293b2c
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded external links, with the primary redirector URL being https://ttraff.ru/pify?keyword=lagu+ambyar+cover+akustik. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a link farm designed to distribute malicious content or phish users.

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=lagu+ambyar+cover+akustik In PDF document text
    • http://zilaso.massapequahistoricalsociety.org/uploads/1/3/2/8/132815296/7566851.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/1/0433/2191/7598/files/jovafizetukegiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/rewisezaburivujugasuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/invertebrates_worksheet_grade_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/41430543534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/81801999922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/96938538973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/xowumagobatis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/33348984288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2500557594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3467/2285/files/loan_agreement_template_microsoft_word.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5423 5396 bytes
SHA-256: 314e8a9d3db006beb04edc364f37ae0be793d7484f5f261725edffcfd88e35ee
font_01_sfnt_off00006680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 10556 bytes
SHA-256: 97cc62bcd75e1240d443257676c0df83749f40926cdc0217bb6f3cb88038efc0
font_02_sfnt_off00008ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE3 16204 bytes
SHA-256: 97d284a3855420cdbdae34860f31dacc38605590ea495453bf7f5ba3a9d42ecf

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