Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8fac93d31a785f…

MALICIOUS

PDF

46.4 KB Created: 2020-08-18 23:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c0af558a48c1686f094329ac3aa905a SHA-1: 1abf3f5f04e693f20a3e42aaf14819e33294e0aa SHA-256: 4e8fac93d31a785f99289da3cb4d36e386f9e78c0b83afccda73c05181b3de38
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a large number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.com/pify?keyword=powershares+senior+loan+etf+fact+sheet, which likely serves as a gateway to further malicious content.

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=powershares+senior+loan+etf+fact+sheet In PDF document text
    • http://files.renxueaustralasia.org/uploads/1/3/1/0/131070911/2350064.pdfIn PDF document text
    • http://files.achenergysavers.com/uploads/1/3/0/8/130874257/567a00ae.pdfIn PDF document text
    • http://dobakipow.strainrite.com/uploads/1/3/2/3/132303382/4667302.pdfIn PDF document text
    • http://files.hello-baby-toys.com/uploads/1/3/1/4/131453807/4352687.pdfIn PDF document text
    • http://files.livingedenmagazine.com/uploads/1/3/0/7/130775668/mulitene.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/1/0428/3367/4396/files/bapazirivolopikoxukofebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamefidijuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0894/2499/files/11032615650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/jireromupapifegibekejoziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/lidolozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/lugoxiletix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2263/6440/files/functionalism_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/43066067178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9632/9636/files/blockchain_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24221046066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/rogavutod.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_off000068c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C0 5064 bytes
SHA-256: 7b35c3bbdedbf8628b0d4787e615447e7f1eac21d67d0d953b5f7596a91605a0
font_01_sfnt_off00007a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A02 16476 bytes
SHA-256: bfbcca2d1514150aa114fbf36fbc901a07da9d7ee9d826fa68c90d42fca2e8f8

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