Malicious PDF — malware analysis report

Static analysis result for SHA-256 86990d694fc19841…

MALICIOUS

PDF

98.7 KB Created: 2020-08-07 08:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e827b05532cd7b74dde5458c6003a3f4 SHA-1: 477ca73d4d189276e8dbcf79c95cc895f949d8b8 SHA-256: 86990d694fc19841fe9ce7df6f78f712b0c16c32f97f56f8b46df3a82622e6ed
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to an SEO redirector, specifically `https://ttraff.ru/pify?keyword=alberto+caeiro+pdf`, which is flagged as malicious. This indicates a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=alberto+caeiro+pdf In PDF document text
    • http://files.thisismayfield.com/uploads/1/3/0/7/130776861/xebenov.pdfIn PDF document text
    • http://xabuz.religionandanimals.org/uploads/1/3/1/4/131453247/350229182c.pdfIn PDF document text
    • http://files.4riverscentercbd.com/uploads/1/3/0/7/130776162/c9d5d9d.pdfIn PDF document text
    • http://files.othersideofeverything.com/uploads/1/3/1/6/131606690/biwigapo-ridezukitubudox-dowin-solonexe.pdfIn PDF document text
    • http://files.byleyvillagehallcheshire.co.uk/uploads/1/3/1/4/131454317/vemudibudego.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/1/0437/7955/5486/files/79971825589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/jidus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9716/0866/files/dumoxapel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3102/6071/files/tikazojodovomagukidezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3735/0305/files/fuvamajafodud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/meparipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/84528436032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4117/5190/files/mexogopagonum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/54432995459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/37587204667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4275/8053/files/wifaweribow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/sibuvetedeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/67291922590.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 5

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_off000146a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A0 5100 bytes
SHA-256: 7f92e04c00aa773b3ed7ecdefe8a0202b41ff8f4f584613da4f1cf16050960e3
font_01_sfnt_off00015805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15805 11176 bytes
SHA-256: 557e07b07d81f4c1696bde2b2503bccbb125addb78b6aef1a78f07dde670a4ec

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