Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca6c9aac5b73a70…

MALICIOUS

PDF

48.0 KB Created: 2020-08-07 21:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d23b7f907051f8da7f9ee2d34d116bda SHA-1: f96fadab0f09e63925d1cae6dd57e63db7778f00 SHA-256: 9ca6c9aac5b73a70ba145a56c4c971401409a9e9be8c20dd2ab6212e409369c4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one pointing to known malicious redirector infrastructure (ttraff.com). This redirector is likely used to obscure the final malicious destination, which is part of an SEO link farm strategy. 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.com/pify?keyword=buddhist+teachings+book+pdf In PDF document text
    • http://xofeke.cheshireneuroactive.org/uploads/1/3/0/8/130813821/pebepidejadivok_nidike_jofiz.pdfIn PDF document text
    • http://files.brendawehle.com/uploads/1/3/1/6/131637853/15e49cb2fe9.pdfIn PDF document text
    • http://files.qmprecords.com/uploads/1/3/0/7/130776206/22c6f523aaa.pdfIn PDF document text
    • http://files.independentlutherandiocese.com/uploads/1/3/1/0/131070845/9a6692eaa7.pdfIn PDF document text
    • http://files.simplyserene.com.au/uploads/1/3/2/7/132740338/fobez-masiwutexe-mizeboba.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/1/0433/0687/7080/files/borutazaweluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5570/9341/files/34173290245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/vigorofuzorix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/meremusakilononox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/exercice_corrig_sur_les_amplificateurs_oprationnel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/iowa_biennial_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/41458254099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2997/8526/files/puwanox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3658/9730/files/21726600417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/parent_portal_cps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/fivewojofivotimikeriveri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/9983825509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/35907854433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/jewuk.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
🗂 Part of campaign: classicsenglishliterature.com 7 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDF 5544 bytes
SHA-256: 49ca4a5e2ad60028cd034bf3e12be224ad6a459db197f68989efec1d40ff9ae5
font_01_sfnt_off000090c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C0 10060 bytes
SHA-256: 95eaf19b3b4c68d21fa99d899c7dde88008eda8dbf84af19be731b40a92eb88f