Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fd33d448533403…

MALICIOUS

PDF

52.6 KB Created: 2020-07-30 21:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db64c01414a89c97a52ff474ba64b7d7 SHA-1: 59e41f94787aeab6778f48f2a87e3a8812b9921a SHA-256: 20fd33d44853340379a763d12dff478075619992c0e9ceb93b4a24681eaf9172
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text suggests a lure related to 'Tcs aptitude test papers pdf'. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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=tcs+aptitude+test+papers+pdf In PDF document text
    • http://files.theinclusionista.com/uploads/1/3/1/3/131381374/8072b579fe61.pdfIn PDF document text
    • http://files.greenbrierhistorical.org/uploads/1/3/2/8/132815220/jagovirimeko.pdfIn PDF document text
    • http://files.campcruz.com/uploads/1/3/2/6/132695701/zilumuzukixagix.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/1/0428/9835/8432/files/wizivudid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1124/3162/files/kowaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5037/5070/files/zupedekaxiwuriw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/27548218246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/55694952489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/wifido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7503/files/pajevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bojakotipizijogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/javumupajaduwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/14773825554.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 3

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_off0000914f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914F 4732 bytes
SHA-256: 54fa6f38ce3fe8ac95f2a8803655ddb9c8c7d417f871568900f61219d8ca8d5d
font_01_sfnt_off0000a173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA173 10568 bytes
SHA-256: 220e3d33a5c2fb860ae4d6c45cd234d69306dcf4c6c4cbd5228da0a99db84a0c

Open this report in the interactive analyzer, or submit your own file for analysis.