Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bcbf7dc4367ffd7…

MALICIOUS

PDF

35.4 KB Created: 2020-08-07 05:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50057935bce9199aae8764f2389641a7 SHA-1: 52a26876b4668515612fef5f8baeabb480a40f31 SHA-256: 4bcbf7dc4367ffd74c53b47899f23129653e63fd0d90658a0fd65bf964cb8858
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=statistical+analysis+quick+reference+guidebook+with+spss+examples+pdf', is designed to lure users by appearing to offer a statistical analysis guidebook. This link is likely intended to redirect users to a malicious site for further exploitation or credential harvesting.

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=statistical+analysis+quick+reference+guidebook+with+spss+examples+pdf In PDF document text
    • http://files.fiban.org/uploads/1/3/2/6/132695300/bezarigugudobewudo.pdfIn PDF document text
    • http://files.superminiatures.net/uploads/1/3/1/3/131380288/jojuru_kabijazazazu.pdfIn PDF document text
    • http://files.negsbestthing.com/uploads/1/3/2/8/132815961/riwemuto.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/1/0437/7713/0658/files/xedevej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/nivotaduraxalij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/xoxewunenigoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2431/7607/files/60515358964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/bearing_capacity_of_multi_layered_soil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/78469282949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7594/4091/files/96896086175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/fazonujizov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6626/9597/files/christianity_and_autosuggestion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/53655820956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3595/0236/files/xiwerevovuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/mekegegapibulidepetiverok.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_off00004a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A2D 6264 bytes
SHA-256: d9aef9a55c9b83245ac17f80d518a3a2218197b9429750dbac581e9a1b9b7e33
font_01_sfnt_off00005f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F62 9588 bytes
SHA-256: b848066c46cd97bf48c22c146b4e563d11ddcbc7c972d508563b374c98dd1d40

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