Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc504ce0db3b84d1…

MALICIOUS

PDF

40.9 KB Created: 2020-10-27 04:18:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d7c0757528977835716e494c91d40084 SHA-1: e2135fffedd47170ae81b354c6267c9c1b08e18b SHA-256: dc504ce0db3b84d121b4c32760314ea554c937b4d989f57347a2d68310ae48d9
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.me/123?keyword=the+mouse+in+the+manor+house In PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/4804ab39a36.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/6316162.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/zegimefoj.pdfIn PDF document text
    • https://famotufenimuz.weebly.com/uploads/1/3/4/1/134132127/gesonitimu.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/giwulu-vojewumenare-jumuwotapoderuw.pdfIn PDF document text
    • https://xobesatiwum.weebly.com/uploads/1/3/4/3/134359431/5773744.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/razizoxonulox_mitobowo.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://cdn.shopify.com/s/files/1/0501/5771/5621/files/perimeter_of_compound_shapes_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2885/4964/files/wiredezimage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/cartoon_photo_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7781/1358/files/direct_sales_team_recognition_gifts.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/jepuvinavasavuxore.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/charlie_brown_christmas_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2800/4039/files/32410935865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/415238363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/1952230973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9630/5567/files/weller_wes51_tips_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/52517957930.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/essential_idioms_in_english_robert_j_dixson.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/goxenuxowifobu.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/entrepreneurship_class_11_ncert_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/betaina_de_coco.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AC 4724 bytes
SHA-256: 33291fa322582a5d16989d308c2d30841e990566331b10ac01c516c6ed37b78b
font_01_sfnt_off00006488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6488 10448 bytes
SHA-256: 5940ac18fca85aac0c7296bcde26dfdbfd871592d5c629e5633354b8e8ae14c1
font_02_sfnt_off00008812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8812 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3