Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c52b8b87828e314…

MALICIOUS

PDF

39.3 KB Created: 2020-08-04 19:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1662d9ab47eee784fe796796c356e19 SHA-1: ce43cebb3556bdb3e10198b747105c90cf126b7b SHA-256: 4c52b8b87828e31484906e73dba7d3c960c75c1439fc6675e824779b0bcb447d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a primary malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the target URL, suggesting the intent is to lure users to click through to potentially malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=miss%20manners%20book%20pdf In PDF document text
    • http://koner.estebanmontesinos.com/uploads/1/3/0/7/130739777/cdd06cf015c5588.pdfIn PDF document text
    • http://files.hyggeorganic.com/uploads/1/3/1/3/131379719/a330fd59c01.pdfIn PDF document text
    • http://files.stepupprojectsouthafrica.org/uploads/1/3/0/9/130968933/691bdd41220b10.pdfIn PDF document text
    • http://files.floydhicks.com/uploads/1/3/0/7/130776125/7840957.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/1/0433/5170/3706/files/kijajuwufuvexawexizufuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7249/5519/files/gixozew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/wuzupavupenedijuratoxoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7482/8953/files/12678421863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/borotigonogipebadaruvovav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/naturumujutukosabexixedof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/gatesixuxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/xisuvubolijonuxeziweze.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 6

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_off00005cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD8 5364 bytes
SHA-256: 676a7e8e720a8a81bebc08fbd438382653013eb0c438a6ff4071d4d46936cf01
font_01_sfnt_off00006f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F02 9812 bytes
SHA-256: 8856a862ea74f7617cf2b6bb684688397027451172cae55ae4ef7366b7a90154

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