Malicious PDF — malware analysis report

Static analysis result for SHA-256 37848fa17a5a3d96…

MALICIOUS

PDF

106.3 KB Created: 2020-08-03 18:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d03ace143d2d73ddbde339bbf024ac6b SHA-1: cba7f6ae8726ad1b0c0c2cd0474143c1f17e6fa8 SHA-256: 37848fa17a5a3d96d0e89bce269c2e21885dbb0c092f43bbda7541efd0671634
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a large number of external PDF links, suggesting a link farm for SEO manipulation. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found in the heuristics. The ML classifier strongly flagged this PDF as malicious, and the 'SE_INVOICE_LURE' heuristic suggests a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=article+19+2+pdf In PDF document text
    • http://files.essense.com/uploads/1/3/0/7/130740260/a522d74.pdfIn PDF document text
    • http://wudix.laurennelsonyoga.com/uploads/1/3/0/7/130738524/a43d23aebefa.pdfIn PDF document text
    • http://files.axokok.org/uploads/1/3/1/3/131383456/xekezerafejabewofel.pdfIn PDF document text
    • http://files.jessicakeyart.com/uploads/1/3/1/4/131453111/mamobibe.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/1/0432/3550/8387/files/kipozigewomof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/11230226503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/benevolent_assimilation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/lumoravarijafasalovizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/71969031065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/96333881489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4066/7808/files/52472994673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/1050162800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5372/7387/files/sajikizurujorujog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/half_cyborg_anime_girl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/48060760761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/sejitekewinejixapisawano.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_off0001588c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1588C 5088 bytes
SHA-256: 3d7a797cbbedf6835de9c7b386bd91ba6db490565ae9e7bd3736b3b86a63ef03
font_01_sfnt_off000169fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169FB 16152 bytes
SHA-256: f4d062b38938e89237d7c64cd31d8bfac42fb8c4938b59874c02beee5aeb8203

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