Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f31c2bfcbf41b13…

MALICIOUS

PDF

65.5 KB Created: 2020-08-21 00:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94e5091dd1cddea205935d5821484608 SHA-1: 1f7c5f0506c82712c5002b97b281af19537b29d2 SHA-256: 4f31c2bfcbf41b136ec8ec7505d57d2979b9db66b61e7fc08f06eeff2991cfa8
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Rcog guidelines hypertensive disorders in pregnancy'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or redirection strategy. The primary malicious URL identified is https://ttraff.com/pify?keyword=rcog+guidelines+hypertensive+disorders+in+pregnancy.

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.com/pify?keyword=rcog+guidelines+hypertensive+disorders+in+pregnancy In PDF document text
    • http://jajurevij.extravagantadvent.com/uploads/1/3/1/4/131438888/vigaj.pdfIn PDF document text
    • http://taxev.yourhomeonthehill.com/uploads/1/3/2/6/132681947/libugelisikeli.pdfIn PDF document text
    • http://muvawage.hcm-electrical.co.uk/uploads/1/3/1/4/131438161/pemavabelonadej.pdfIn PDF document text
    • http://pimuwi.x-btc.com/uploads/1/3/1/6/131607062/nebepetababu_bemojokipasegi_gukigarivelabik_nakelojar.pdfIn PDF document text
    • http://luronude.grillinmagic.org/uploads/1/3/1/3/131380397/lasiwidozoporov.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/1/0430/9978/3319/files/85564304312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/6297/7689/files/escape_room_game_level_116_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/govifisorevuxifefasirudiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/general_cable_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/repitilififil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4838/7239/files/51180280096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2054/0310/files/morofizesopaveleremimusid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/sateriparidotumafaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/99671151609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7075/7791/files/35793103793.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 1

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_off0000c1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DD 5504 bytes
SHA-256: fe8a0c520c3980533b3620dae59a1a451784c71b513f6e8b91884078823927d5
font_01_sfnt_off0000d498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD498 10532 bytes
SHA-256: f9e31e27cea87ada864960e087649b7115f295b9c52807be8d1d7c244b5ea29c

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