Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34a818d5c42b670…

MALICIOUS

PDF

45.1 KB Created: 2020-10-11 12:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f2574b57a3c3b4e83d0ce0ec207eea7b SHA-1: ed200015fb9837c4ed2cfe8093431fbc22a8b85f SHA-256: f34a818d5c42b670bee31f7f5e6e67a97961015b76370647c175c26a233bce45
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/pify?keyword=sager+notebook+drivers In PDF document text
    • http://files.creativeillusions19.com/uploads/1/3/0/8/130873715/ferividadututozabi.pdfIn PDF document text
    • http://xekaxaxod.horriganarchitect.com/uploads/1/3/1/1/131163617/018314da.pdfIn PDF document text
    • http://files.katherinemarieprice.com/uploads/1/3/0/7/130776296/3140051.pdfIn PDF document text
    • https://site-1039505.mozfiles.com/files/1039505/16602712505.pdfIn PDF document text
    • https://site-1042633.mozfiles.com/files/1042633/kegunamoxe.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/27797831646.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/nipenowudajalukudi.pdfIn PDF document text
    • https://site-1048481.mozfiles.com/files/1048481/72696689405.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/1/0492/0370/8053/files/89568197212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9598/0709/files/dkny_be_delicious_for_men.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1058/3451/files/pudorajorufubiluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0316/8936/files/26681020335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2238/4793/files/american_express_merchant_financing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c1e46e-4955-4fe8-8060-0add623a2796/88003555718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/345856d9-ccc6-4ff3-b9a8-d4729864b9ca/2669050187.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_off00007147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7147 5328 bytes
SHA-256: 61b902ce30d5f0477dae73193b0667c48a4bc257321fc43cae183441bd015500
font_01_sfnt_off00008373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8373 10476 bytes
SHA-256: b2062fa19613d26af3eb308b9670f0ce61b811e7304b8a79af791839febc2d70

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