Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d12e663ea1b55ab…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 06:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4701d67af668d353f8f34885b27208dd SHA-1: f3f4964f4a2a43cc998c078a6b81f6b160db35ab SHA-256: 4d12e663ea1b55abd1fc304c9fd5d075345ae0c1e77f35ab419acb4d7e6b1c5b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector link to 'https://ttraff.com/wb?keyword=spending%20habits%20of%20students%20research%20pdf'. Another critical heuristic identified a PDF link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the malicious intent.

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=spending%20habits%20of%20students%20research%20pdf In PDF document text
    • http://files.newbeginningssanangelo.com/uploads/1/3/1/6/131606268/2311775.pdfIn PDF document text
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdfIn PDF document text
    • http://files.scouttrout.com/uploads/1/3/0/9/130969874/192e0d2308a.pdfIn PDF document text
    • http://files.1ccauburn.org/uploads/1/3/0/7/130776645/mojudotewi.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/1/0435/2809/3856/files/relumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/xulagetigugawemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/gejudog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2273/5767/files/zesakevopewawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0854/6200/files/sojuvekuwabusenupab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/negujinalekeromo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/waxisatem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9311/5548/files/nutosaboxawawugobulitor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/67986561892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/xamuxepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/jakor.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_off0000659f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 5628 bytes
SHA-256: 1c2ddc01eefb45c5f8e64116496df75c717b22af492401e0f7eabc8fc7926170
font_01_sfnt_off000078bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BD 9924 bytes
SHA-256: 10fe34484ecf997f0f9985ed3a38f597b9ea1eaf67171f6146d238e99ead12f1

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