Malicious PDF — malware analysis report

Static analysis result for SHA-256 225dbd55bba4fc79…

MALICIOUS

PDF

41.0 KB Created: 2020-10-08 00:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8ac0ce208bca417661571d6c2fd8eb6e SHA-1: 7526b3d64c55aa4b9b469ba48f0e8bf1b9d10f15 SHA-256: 225dbd55bba4fc79db264c8ae8b7f67f8699c821e843ce5e7be09b29bd55ed1b
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://gettraff.ru/strik?keyword=frister+rossmann+cub+4+sewing+machine+parts In PDF document text
    • http://files.pokemontcgstore.com/uploads/1/3/0/7/130739190/6999933.pdfIn PDF document text
    • http://files.michaelpachelo.com/uploads/1/3/1/4/131455543/cffc9ff704fdbf.pdfIn PDF document text
    • http://files.purposefulgrowthcoach.com/uploads/1/3/0/7/130774977/683e32.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/1/0434/6147/6509/files/understanding_movies_louis_giannetti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/tovofasixusis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1303/5416/files/2012_end_of_the_world_full_movie_watch_online_dailymotion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3784/1813/files/blank_facebook_profile_pics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1860/7521/files/george_washington_carver_quotes_on_service.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/4612/3937/files/tolujut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4109/8398/files/eso_essence_of_ravage_magicka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5437/0468/files/47467610061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1055/5034/files/70389490105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7978/2566/files/44175948648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/note_9_att_update_july_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/82052643713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5709/3029/files/ufc_202_live_free_streaming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/5142/7495/files/lofixokuvor.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_off00005bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFC 5588 bytes
SHA-256: 11fe1e57d6cd4fc46367fbb595744196060c9f355f864e0ae629c163ec4c7802
font_01_sfnt_off00006eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEE 12436 bytes
SHA-256: b2106bf2d1ac3532a996857d1e397ff738e4f301c0cbf0493807edb67afeaab7