Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd6bcbade31df06…

MALICIOUS

PDF

46.6 KB Created: 2020-08-28 09:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3bc87cb3cb3f5a919ef0b894d0bd249d SHA-1: 4da730a86a11fe81fea1ee81487530e0a935522c SHA-256: 7cd6bcbade31df0689cba2558dda8aee81cfe5dbe0a4a27a8eee17b5c0d4ea38
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for a "Kaspersky trial reset 90 days" and embeds numerous links, many pointing to a redirector infrastructure. The heuristic firings indicate it's a malicious redirector and part of an SEO link farm designed to trick users into downloading potentially malicious content. The ML classifier strongly supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=kaspersky+trial+reset+90+days In PDF document text
    • http://files.christieslines.com/uploads/1/3/1/4/131437728/25e8408b.pdfIn PDF document text
    • http://files.thewondermart.shop/uploads/1/3/0/7/130739264/5ba55a98.pdfIn PDF document text
    • http://voliwifaz.anniarts.com/uploads/1/3/1/4/131452972/samajazutonu.pdfIn PDF document text
    • http://wedibeda.victoriavisions.com/uploads/1/3/0/7/130775350/80d3b.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/1/0432/6824/3624/files/yaseen_sharif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5863/4650/files/rejevunawedode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/menadifotidobujubelutawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/bimugodejijajuzupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/tabela_de_riscos_ambientais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/melesakesogerajeluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/3_table_euchre_score_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/da_1380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/7858/2171/files/96893685725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2259/8823/files/nebetepimofejusipoxeme.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F1 5388 bytes
SHA-256: 4ad4d06ffda67e673f50fd7d39352542952eb69bc5a74edc8f5cbc06c88537c0
font_01_sfnt_off00008956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 10868 bytes
SHA-256: 1d0ea2d4d8a4a8ed4e5dee42b0c504660a05a3f20ffb895103a15e6f21bcbb11