Malicious PDF — malware analysis report

Static analysis result for SHA-256 64651195636fc4a3…

MALICIOUS

PDF

67.0 KB Created: 2020-10-29 11:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 206b8a42e93a6f8075edb75366b1c72f SHA-1: 34648577a6ca546ca81674c38ae261ce0aaaa11a SHA-256: 64651195636fc4a33631addcd2c4eca38146c5d1a19420ea28642663e15f6141
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate documents, but many redirect to a known malicious infrastructure. The primary redirector URL is `https://gettraff.ru/strik?keyword=towa+towa+birds+for+sale+in+the+usa`, which is also present in the document body. This indicates a phishing or scam attempt using a link farm strategy to generate traffic and potentially lead users to malicious content.

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://gettraff.ru/strik?keyword=towa+towa+birds+for+sale+in+the+usa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5f9a5894d61d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5f8fc84036c11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f8b1ce7e9b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_5f96d1e117993.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/1/0438/0907/9458/files/critical_discourse_analysis_van_dijk.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/dimawenimomokilalevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be616817-93b7-4be1-8b5c-e7ca3fdc3324/22669280863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/navien_water_heater_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4279/8250/files/46862833173.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/vewedatukarimixutokagu.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/basic_english_grammar_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7910/2378/files/31631109889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4423/6183/files/autocad_electrical_2020_black_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6905/8455/files/pet_adventure_guide_ragnarok_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2097/3729/files/chevy_cobalt_manual_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d431b88e-66b3-46c5-8b24-2233f0473600/11764607057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4564/2663/files/48039277582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2503/7975/files/51918314467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0160/8854/files/adonit_pixel_android_apps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d118872-379c-46b1-bd81-1a43b0839042/89778159787.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/free_download_islamic_books_in_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0863/8632/files/19156368495.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_off0000c7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D5 5176 bytes
SHA-256: 8f2b462dc0650e0438ce3f6ac6c11252e0876d0939ac566a7dc86df8a133941b
font_01_sfnt_off0000d973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD973 10876 bytes
SHA-256: d8554c85198ceed21577420e4f183823e8d949c4ff57a7aa7e98662bf1c4fcfb