Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d38cdd98e445df…

MALICIOUS

PDF

42.1 KB Created: 2020-08-08 17:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 33f1e0a7c8bd3fd49105c266b6218620 SHA-1: 16161c39fd3af04edd5c4b98a0918e64544b97d3 SHA-256: e4d38cdd98e445df1c06dd51e5854967e746cd68d4320bbfb78f576b8f68b7e2
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=op+amp+circuits+examples+pdf', which is a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious infrastructure by masquerading as a technical document.

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=op+amp+circuits+examples+pdf In PDF document text
    • http://files.inspiredinksbymadeline.com/uploads/1/3/1/3/131379928/gijati.pdfIn PDF document text
    • http://sobazezi.capricruz.com/uploads/1/3/1/4/131407089/3061974.pdfIn PDF document text
    • http://baxujobel.albertabaton.com/uploads/1/3/1/4/131408027/5c71fb614b7.pdfIn PDF document text
    • http://files.olgausova.com/uploads/1/3/0/8/130814596/dd59a536eee44c.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/1/0432/8790/4411/files/21270092000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4189/7113/files/79924412979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/72199491412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9187/0375/files/fundamentos_psicologicos_del_curriculo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/vovebojaxisitokiwediki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/mercedes_benz_a160_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/61880486507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/bulilaxavokiwelowogikuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/70076541801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/something_awful_emoticons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/23664935134.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 4

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_off00006698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6698 5396 bytes
SHA-256: 2c64d206fde4154d69995f7c4181560dd354b0b14c05537a861db4086031a319
font_01_sfnt_off000078da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DA 10236 bytes
SHA-256: 0bedf49a58eff1c5b0dc1e9e7d55131331a893f3eb720520d946c538d9c9f79b

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