Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8525e4b99c78aa…

MALICIOUS

PDF

51.1 KB Created: 2020-08-04 14:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c9a50bdbe504b4444a95edf299f3599 SHA-1: 160365be7df48f3abfe95098cccf8f3efeaac032 SHA-256: 3f8525e4b99c78aa19ed8d2174641e75b9fd0591e0059dbc54567ea6eb289113
202 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for an 'advanced excel course tutorial pdf'. This suggests a phishing or social engineering attack aimed at redirecting users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=advanced+excel+course+tutorial+pdf In PDF document text
    • http://files.butterflyworldcoombs.com/uploads/1/3/2/7/132712096/8644542.pdfIn PDF document text
    • http://files.edenspabeirut.com/uploads/1/3/1/4/131437418/1309a34f0.pdfIn PDF document text
    • http://jagarup.cgapak.org/uploads/1/3/0/8/130874474/bomamukonut.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/japoxotoruzub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1806/6842/files/fejebiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1538/0892/files/79012753128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/vadibotosevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/82332534153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/27700461094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/61888783357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/juzuxugano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1325/0972/files/pivekoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/setarujizaxemifumibatonek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/gilizexorasamovadop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigirerunozekolufis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/netgear_nighthawk_mr1100_manual.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
🗂 Part of campaign: cgapak.org 3 samples

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_off00008900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8900 5268 bytes
SHA-256: 60fad44d8177dcf08b61251f17bab8fb54dfcf5bb1d5d3e5cf7ceb65de142f66
font_01_sfnt_off00009b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B03 10812 bytes
SHA-256: 1fe245253c9dfdf95737b068ac25f7f487b0b33edb302ad0eed1d644a46931d2

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