Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e673bf76517a17…

MALICIOUS

PDF

45.3 KB Created: 2020-10-02 01:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 73589b59573ef801b5c7287561581fa1 SHA-1: 0fc1888670aedb445d8810e3f3b2b01f0ba93090 SHA-256: f5e673bf76517a176514c40ea9b9914025a8c20d605f0b356d2811c8cd88bd77
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to disposable hosting, which is indicative of a link farm. One of the primary links, 'https://gettraff.ru/strik?keyword=export+icloud+keychain+to+android', is flagged as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=export+icloud+keychain+to+android In PDF document text
    • https://site-1036721.mozfiles.com/files/1036721/jatawexi.pdfIn PDF document text
    • https://site-1036867.mozfiles.com/files/1036867/nemototifepirebi.pdfIn PDF document text
    • https://site-1039667.mozfiles.com/files/1039667/29691338377.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/81443390074.pdfIn PDF document text
    • https://site-1038312.mozfiles.com/files/1038312/98683237345.pdfIn PDF document text
    • http://files.soulblisshealingcentre.com/uploads/1/3/0/8/130814121/dojaxapugivefepate.pdfIn PDF document text
    • http://jepin.mmha.net/uploads/1/3/0/7/130776699/fuvij-mufexeroreze.pdfIn PDF document text
    • http://files.joyofbeinghuman.com/uploads/1/3/0/7/130739628/pafizekerojo-witidofuponeko-xakokimodor.pdfIn PDF document text
    • http://ruvejufet.southwestautismsupport.com/uploads/1/3/1/3/131383562/cd355a459d62.pdfIn PDF document text
    • http://jusegub.kcollection.in/uploads/1/3/0/8/130874222/sofimilugamafug_webuterasufafa_tawadopigeb.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In 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/1/0483/0340/7266/files/babys_first_years_memory_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2028/2787/files/12_types_of_intimacy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/fosetevulijazuxonuxorod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a240a8c8-78dd-4552-ab90-bfb9e23bf74f/84163467700.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_off00006446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 6168 bytes
SHA-256: 50bd8db5ff9a0f03ea6ac0366ab4ff273dceb6ff0c6101ac0faff1fd52ccc92d
font_01_sfnt_off000073e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E8 5176 bytes
SHA-256: 6912b60dd358f22ffe0b99858042934937c5e85024e6bbe92596d5a6abcd0169
font_02_sfnt_off0000858b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858B 10204 bytes
SHA-256: 106a50af02ee19cbee8492f5f53376b83578706207b3278cde83afc68249daf9

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