Malicious PDF — malware analysis report

Static analysis result for SHA-256 320349e0f282497f…

MALICIOUS

PDF

74.1 KB Created: 2020-12-18 21:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 89a50c7cda6f0974f46e6a8ad856c361 SHA-1: 910e51c63cfdc317f8b12982df3ab6fc6117ca3f SHA-256: 320349e0f282497f466f64133084ddf0e36f75a6a8b6bb4b9520ac7c8f5b7f52
84 Risk Score

Malware Insights

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

This PDF document contains a lure referencing a 'Lennox 10f81 icomfort wifi thermostat blank screen' and includes a prominent link to 'trafftec.ru'. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicates this is likely an image lure for a free-download phishing scheme. While no scripts were directly extracted, the PDF structure and the nature of the link suggest it is designed to redirect users to a malicious site, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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
  • 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/strik?utm_term=lennox+10f81+icomfort+wifi+thermostat+blank+screen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384634/normal_5f99f7b453fef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f9c86a08c818.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000e238.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000e238.bin)
    • https://uploads.strikinglycdn.com/files/10164491-84d2-4f3c-bc4b-4fd5d019836d/jizekikufaresirunitutor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9cc811e-90b9-4d5a-9526-6fcb2d319f6f/ruwujiremari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c09190c6-dfd9-4956-b790-ba220af578d5/too_young_to_be_a_dad_full_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f0285a-f62f-426e-b83f-044d426abcbe/vringo_message_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c7bc34-81d8-4dd2-95e1-e22867da9950/82468477066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d08235d-f113-4dba-93af-395684f3adcc/zujajapamapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a41a3f-87bb-4aec-95e9-29315e4f6d8e/diego_garcia_military_base_icao.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f2ac0f-a355-48ef-93a9-e31ec3f657de/winter_lunar_chronicles_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f412108a-5b00-49e1-86bd-103664ca8c7c/vukavozotafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fafadbd1-30ab-49ec-9ab0-14e9c2b1fcc1/29555290695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee8fd3d-a7ad-4d10-a92e-57bb01705815/wezekosigisisagerowopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69f8da2-8662-4218-b09b-e637386fc8b5/rugovapebijovesidixak.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 extracted file (font_01_sfnt_off0000e238.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5F 5388 bytes
SHA-256: 98dcf880302e1f8c3c6f57b45ad2dacd48c9fa6421541d0d807696d79ff4b250
font_01_sfnt_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 5812 bytes
SHA-256: 5bf4479e9603989493e7b6ceee6b02bf48c76df16b9df6bf308ee5d1237e1de0
font_02_sfnt_off0000f602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF602 10800 bytes
SHA-256: 27aeefad8c08a12d7f9129b6f2c13de8fd64a1c400fc0879f250f1580cdfa283