Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded4707546ab9e41…

MALICIOUS

PDF

75.6 KB Created: 2020-11-26 23:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eacd9fdb56816b92055572aa7985ed07 SHA-1: 135acb2a9bae6e9eaba5a0e3cf7da13d4576b50e SHA-256: ded4707546ab9e41cede2530c53445f7b5d5c9b175eb2309c83909070bff3038
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as an SEO link farm and a high-confidence heuristic flagging it as an image lure linking to an SEO redirector for free downloads. The primary malicious URL identified is 'https://trafftec.ru/aws?utm_term=business+plan+for+bakery+shop+pdf', which is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?utm_term=business+plan+for+bakery+shop+pdf PDF link annotation
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/465d9fb126d.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f8810df987db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7cb2e0f5-5db4-4a09-87b7-42d69179b940/7_jours_sur_la_planete_videos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0940ed33-151b-486a-8211-930ce7383c1d/kogejubasovofekikowufun.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/whatsapp_camera_android_github.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/33522782410.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/chlamydia_informacion_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/36572956673.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2F 5284 bytes
SHA-256: 17aac7ab12f93be7fd0fe92bd76ad943015dfe5fdde30bcefa273e705a274b09
font_01_sfnt_off0000ef13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF13 10940 bytes
SHA-256: c4b016bf082d5cc817dff13b978e9c34a668dc8827b7829e069e008e11092d74
font_02_sfnt_off000113fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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