Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2358be53cb3e64…

MALICIOUS

PDF

41.8 KB Created: 2020-08-10 15:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8403bc8a8f74987937c35ad7d2852bf SHA-1: f094b2b3fd45b16cc7de864a1a1d9c7a7005e1eb SHA-256: cb2358be53cb3e645d5b3527a96b77ba4cf65d3c77d944e73908d4d3d60d0509
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with numerous embedded URLs, including a critical redirector link to 'ttraff.ru'. This suggests a phishing or SEO poisoning attack designed to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of a malicious redirector and a large number of outbound links indicates a high likelihood of a phishing or content-luring attack.

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=adobe+reader+how+to+install+pdf+printer In PDF document text
    • http://files.mansioninternational.com/uploads/1/3/0/7/130775396/4025645.pdfIn PDF document text
    • http://files.nwaseniorresources.net/uploads/1/3/1/4/131453682/bizedorurufa.pdfIn PDF document text
    • http://files.laurendfraser.com/uploads/1/3/0/7/130739059/kokid.pdfIn PDF document text
    • http://files.kpcdesign.org/uploads/1/3/2/6/132682868/3198935.pdfIn PDF document text
    • http://files.concretebendoregon.net/uploads/1/3/2/6/132682542/773040.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/1/0448/1282/8833/files/the_bro_code_barney_stinson_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1054/7099/files/funowagutozod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/juzenesigod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6371/3695/files/29894342186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/engineering_economic_analysis_11th_edition_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3573/5717/files/zevud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/32179164308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1914/0253/files/bomusakowojuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/metowevug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/vifetudilovebaxuf.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_off00006531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 5352 bytes
SHA-256: f4151143fb7ea9775e4eccdb944467fdf73d08153203d1a1f2931ebf5b790710
font_01_sfnt_off00007764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 10112 bytes
SHA-256: 6a0fb59a066e576143071a3399fc9fb2c613c5d69e41880f1f7abb88e8420c7c

Open this report in the interactive analyzer, or submit your own file for analysis.