Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9c2b42b4cf0115…

MALICIOUS

PDF

44.4 KB Created: 2020-08-04 04:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0377113c032846af86ad220e6f19c919 SHA-1: f8af69afa84fb0d52d548b2d473ab4ff219a02f3 SHA-256: ab9c2b42b4cf0115ccf9601a04e174e5c9bbae4825c48907838c3d68dd173c11
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=apostila+de+administra%25C3%25A7%25C3%25A3o+estrat%25C3%25A9gica+em+pdf', points to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Apostila de administração estratégica em pdf', suggesting a lure to download or view a document. The presence of numerous Shopify URLs, some benign and some unknown, indicates an attempt to blend malicious links with seemingly legitimate ones.

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=apostila+de+administra%25C3%25A7%25C3%25A3o+estrat%25C3%25A9gica+em+pdf In PDF document text
    • http://nabuwo.illinoishousematch.com/uploads/1/3/1/4/131482952/53d5e9bdc94.pdfIn PDF document text
    • http://files.robynlester.com/uploads/1/3/0/8/130874567/fipubufud.pdfIn PDF document text
    • http://files.sobremesasmag.org/uploads/1/3/1/4/131455543/8246187.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/1/0433/5747/0872/files/6294114891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/92159713644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/fozeridivawibibigeruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3242/0262/files/1449790042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/vezojutarejodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/sinib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/pimiralojivobabidoboki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/xegod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3974/2359/files/wegafafapukoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/99511432627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/91224367941.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 4

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_off00006b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B85 6104 bytes
SHA-256: 1fe1d0a4ab38e30372b8382f31b9c551daafce8f9eec2727d77419f6ad64b786
font_01_sfnt_off00007f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1D 11732 bytes
SHA-256: 515010022b2f1ae615e9fd4055372eb9e0879c46560b53f2eef2bb03fe15a2d4

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