Malicious PDF — malware analysis report

Static analysis result for SHA-256 141552e51b098f2a…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 06:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 671773c372963f1ff7033d0a257ac933 SHA-1: 46d79a764d4678d6bc38adf2b852238e6167f734 SHA-256: 141552e51b098f2af128020fc9796350f0b81a88e33b8053ca92c3be0a64838e
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure for free downloads, likely a phishing attempt. The ML classifier strongly indicates maliciousness, and the presence of numerous SEO-optimized links points to a link farm designed to distribute malware or facilitate phishing.

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.cc/wb?keyword=placenta%20previa%20tratamiento%20pdf In PDF document text
    • http://files.peggriffith.com/uploads/1/3/0/7/130740367/7fb79.pdfIn PDF document text
    • http://files.isabelcalkins.com/uploads/1/3/1/4/131453111/niwivimol_tedanur_bapila.pdfIn PDF document text
    • http://files.metalexpressions.com/uploads/1/3/0/9/130969525/4140703.pdfIn PDF document text
    • http://files.busylilbeefloral.com/uploads/1/3/1/6/131606346/9a9f3b.pdfIn PDF document text
    • http://files.unfinishededucation.com/uploads/1/3/0/9/130969992/453ae9bf.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/1/0434/7750/0056/files/west_virginia_university_physics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/25488501313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/68553016156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5385/9494/files/ios_10_emojis_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/84840710325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/tilexafadoxiwafilurujojib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/luriwageregasadobajoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/pepiduvigirabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/d_d_3._5_complete_psionic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/mixibodidodejabizat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4076/3030/files/code_alarm_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/togada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/wimimuketos.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_off00005f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 5184 bytes
SHA-256: 34c7e609dceae73736ba84e9455d5425bd33849e149c2e967478ddc12904a297
font_01_sfnt_off000070ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AE 10332 bytes
SHA-256: ad653b5667b6b045055a48a3bae1292710b2f8d080e7141bcc7ad03954af93a4

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