Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac256616f812559…

MALICIOUS

PDF

44.4 KB Created: 2020-08-07 15:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 47c0c0f19fcc09e067f373163127acf6 SHA-1: 38e528eb62763684e88e5a74e1f1f78fe9e04cd4 SHA-256: 4ac256616f812559479c95d41ab7faa78bb64519a47db7515754d13c1e104397
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains including a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting the document's primary purpose is to drive traffic to malicious infrastructure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic further confirms the malicious nature of the embedded links.

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=ancient+history+class+6+old+ncert+pdf In PDF document text
    • http://files.lovinglifeguidance.com/uploads/1/3/1/1/131163976/28c603a0.pdfIn PDF document text
    • http://files.ashleys-plate.com/uploads/1/3/1/3/131383924/5a57c1fd1447f9.pdfIn PDF document text
    • http://files.mccannsatthemeadow.com/uploads/1/3/2/6/132682754/8477390.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/1/0430/2936/4885/files/perkembangan_pendidikan_islam_di_malaysia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65817182127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/64352637984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/7624170436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/92531455312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/mhxx_brave_style.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/6879543538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/11783509001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/50708296688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/dumulelenerabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5496/4629/files/difeguvemuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7204/5734/files/if_statement_matlab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/meketenuwutidodikagawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/pdf_split_and_merge_download_2._2._4.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 2

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_off00006da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA3 5488 bytes
SHA-256: f8c422816fb498d27d0c0a885dc63a16f537f66fa24fa8cd72963a5267ba47dd
font_01_sfnt_off00008052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8052 10524 bytes
SHA-256: a4f0973b3842cfca810ddd4ea12a1b2274d5f6ff6fbf8331ceb9434e42cfa634

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