Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3931f55072f8b7…

MALICIOUS

PDF

35.9 KB Created: 2020-10-11 12:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a46400efe24aa0e6b530039a97ae0602 SHA-1: 7dab946387911b70b8687a5addc9b68a2aff5e80 SHA-256: 0e3931f55072f8b7d591ff771f93658722379d47e880433c75c91c000003d0d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ggtraff.ru/strik?keyword=awit+para+kay+inay+letras+por+dft+re'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with the first identified as 'http://xolidikol.tracygrammer.com/uploads/1/3/1/4/131453960/2566f6969680.pdf'. The ML classifier also strongly flagged this PDF as malicious. These findings indicate the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=awit+para+kay+inay+letras+por+dft+re In PDF document text
    • http://xolidikol.tracygrammer.com/uploads/1/3/1/4/131453960/2566f6969680.pdfIn PDF document text
    • http://files.evalefkowitz.com/uploads/1/3/1/4/131453199/pagofanatufe-gurifeba-pidigirixevijut.pdfIn PDF document text
    • http://pudobeba.mjlphd.net/uploads/1/3/1/6/131607110/6445ef7d93d67.pdfIn PDF document text
    • http://selufet.bookscapes.co.uk/uploads/1/3/1/4/131437402/7098583.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/1/0483/8221/4301/files/48954516271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3620/8025/files/7330208025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9756/6616/files/gobeweraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/3248952286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0488/9758/files/zefefipubugozakete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dbf7825-1a43-4db7-97c2-c88fd01cac19/mupugusilumoputevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f20a9f-9548-49a1-8935-85b0c24f6a8f/musirexolawixapezuwixome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9b33e7-5517-459e-bcfa-83053c9ffaa0/17078191013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8521dd-7e4d-449b-8033-08884e9336c1/maseg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d2ab36-66b1-4a60-820f-5ee202cbb36b/lipevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b1b62a-def1-476d-91c0-081b87ed5135/xivunijemirunexejuvivezos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e246f0e0-7f14-49b4-841e-bdd8a04c739f/dabelupexesuloja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc73cd87-d81f-49ce-bd69-1a9b8de4b43d/44234117008.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_off00004f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F98 5284 bytes
SHA-256: ab1f8466050244805169601e1807aae8e65233738dc3c749852e2788095eea9a
font_01_sfnt_off000061b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B2 9660 bytes
SHA-256: 7570c4d12745c87c8dc1c8b01a42001dac3b2cdbde78a78e142ffda95b8375c2

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