Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3517e196d38d72…

MALICIOUS

PDF

55.0 KB Created: 2020-07-30 17:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3992796d624c1ccd601984a42060c274 SHA-1: 80b8367e18434be803015b5f36e7d2c26543a301 SHA-256: 5a3517e196d38d7281b7e67d2df62c46f4505c8675f8a5f74abe3e26d3d12b18
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links designed to appear as legitimate search results for textbooks, but they redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a clear intent to lure users to malicious sites, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious redirection campaign.

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=larson+algebra+2+textbook+answers+pdf In PDF document text
    • http://files.humanivillages.org/uploads/1/3/0/9/130969428/rejewabilirijadana.pdfIn PDF document text
    • http://files.stonecutterswsq.com/uploads/1/3/0/9/130969818/3446600.pdfIn PDF document text
    • http://files.mr-stevens.com/uploads/1/3/0/7/130776864/zoxakaso.pdfIn PDF document text
    • http://files.newteachersretreat.com/uploads/1/3/1/3/131398517/3759174.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/1/0431/0820/4708/files/dudekakanepevilaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7270/6977/files/jikoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/mefomagixupilunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/66602580083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2951/files/58050032928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4620/7650/files/93940691065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51507598499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/pijogekizupakajowinuxizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/jaxodafafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/korirebazuwedowatema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/gavowipozukeguwakekamum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/dorataligin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/paluligebirasafuvakirito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/mowerit.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_off000095ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AB 5388 bytes
SHA-256: 39222564b3e37a7c5756feb816071fb7ce966b2122d263f3a88025be66025eb5
font_01_sfnt_off0000a821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA821 10656 bytes
SHA-256: 2a9c26a9ef56a2bad2d1cc7139bb04037a3c99c495d4b3a94c517ae00ef4632e

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