Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a383e87201e57b1…

MALICIOUS

PDF

47.7 KB Created: 2020-10-16 02:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0372320927a4a13ffa6175c83b9cc14a SHA-1: e1579972a959de89a98c9949bd5282b059a4cf89 SHA-256: 5a383e87201e57b1b2daa959589a1a13388d92675196d5d033c73ac9e18b7ad2
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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
  • 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.link/pify?keyword=episode+mod+apk+download+android+1 In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8742796.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f877782a3b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8715be0142a.pdfIn PDF document text
    • https://site-1041782.mozfiles.com/files/1041782/25827512899.pdfIn PDF document text
    • https://site-1044154.mozfiles.com/files/1044154/37248317582.pdfIn PDF document text
    • https://site-1040428.mozfiles.com/files/1040428/photo_art_effect_apk_download.pdfIn PDF document text
    • https://site-1038837.mozfiles.com/files/1038837/lodanoda.pdfIn PDF document text
    • https://site-1042502.mozfiles.com/files/1042502/zikivef.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/1/0431/9209/0788/files/brenden_theaters_vacaville_open.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/9949/6871/files/mulberry_high_school_graduation_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4724/6760/files/ttpod_apk_download_latest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5484/5082/files/group_3_periodic_table_characteristics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554a7e76-e77d-497e-9ad2-14db3ed63fab/22592858684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866d6415-f2cb-4f42-8f12-c4ddc4962885/89992002255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8580/0645/files/60225813444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2994/5758/files/julasovoxaxuratijez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/are_rabbits_herbivores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5221/1099/files/pevixowawezobibegobup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2479/2224/files/pfaff_varimatic_6085_manual_in_english.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_off00007be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE2 5272 bytes
SHA-256: f36d70eaae5c046250bed85f8b85df99285a8640b5f4634a8c6d3397f7785376
font_01_sfnt_off00008dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC8 10388 bytes
SHA-256: e948e90d1e0195bb83a16a6663ffa7515a4894436a05e618d6a9ff65456b8173