Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe6520852c22da4…

MALICIOUS

PDF

94.0 KB Created: 2020-07-31 08:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b75021c20f0450dfd2c2597651bc3a7 SHA-1: c5b38e4902b0aa384cca3b49d4ea2f2962e83092 SHA-256: cbe6520852c22da473aed3fa5f274d49f1a26f12c036322da4e1623443cc6355
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.ru/pify?keyword=azitromicina+liquido+bula+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Azitromicina liquido bula pdf', suggesting a lure related to medication information. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

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=azitromicina+liquido+bula+pdf In PDF document text
    • http://files.allieherrera.com/uploads/1/3/0/9/130969489/812087.pdfIn PDF document text
    • http://files.gbpsu.org/uploads/1/3/1/8/131872055/rupeniwuligowodep.pdfIn PDF document text
    • http://files.thetntmteam.com/uploads/1/3/1/3/131382395/9052969.pdfIn PDF document text
    • http://files.westchorus.com/uploads/1/3/2/6/132683181/bimamojuzusuw_kazifonefe.pdfIn PDF document text
    • http://files.nationalwealthcenterclub.com/uploads/1/3/1/3/131383760/fanibigakupaxo_zetasunev.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/1/0433/0127/3758/files/lujofarenazebuzonejigeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/93896660424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/wuwozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9041/9616/files/28648211023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/rulasegedosufem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/78875907675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/vobaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/lulaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32686583269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/zufuzediwowaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/43367247704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/84859155285.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_off00012981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12981 5192 bytes
SHA-256: c1f75a20ad0bdfa41a3566045da49758d99232b34616267d3e318130537c166e
font_01_sfnt_off00013aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFF 15196 bytes
SHA-256: aee36f79b4784fbb540cecf5e0b97ef75182cb4cf8b69ff08ecfc20cca7a7647

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