Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7559bdd51b890bc…

MALICIOUS

PDF

63.6 KB Created: 2020-10-27 21:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5ecee098e2ebc71d1e8afe87f4f049ed SHA-1: aeca8cb070d085cfb9ab3e54d2c9316b2b82009c SHA-256: e7559bdd51b890bc5d7c441610807144a9a928deb05d35dc358c43f3493e6a92
194 Risk Score

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://ttraff.me/123?keyword=journey+to+china In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f8e2726caff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8b669d13141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5f9250d5f0b53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8a8076c0ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_5f8de8e5b0111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_5f8e25101b91d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f914b2482dc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f8a7d1470dee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_5f90724d4b82d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5f8f42e3b1ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5f8c1aab83348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_5f963ebf1297e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f87361389ccc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_5f95714a8ee20.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/1/0486/0156/3301/files/mekepajixowawavixepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0471/0282/0502/files/fodetadarexolalele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3123/5224/files/cruciverbalist_is_a_14-letter_word_for_people_who_enjoy_which_hobby.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d07cf261-5896-481e-ad73-d1863062d4a4/949039927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d07d752-ca15-4aef-b10c-563ec7a39c81/wakebef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd48970d-80f1-4d85-ad98-12c486f6bee9/4136993149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446004d7-ad31-4241-827b-04eedd4eee72/rajofubirakitetiren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955be22c-7596-451f-8eb9-d8e7a12175a6/4427834284.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_off0000a1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F5 4652 bytes
SHA-256: a34aaf495ab2dc7e8776685afc5cbc47536d22682260ea6e9e40d22380946bfb
font_01_sfnt_off0000b1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BC 15568 bytes
SHA-256: 87771ef0335fc73bc2b1c98f8bced0fc3dfbb517239b9c17dff0122ac17b4aab
font_02_sfnt_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c